diff --git a/app/models/advertisement.rb b/app/models/advertisement.rb
new file mode 100644
index 000000000..03d41a3e1
--- /dev/null
+++ b/app/models/advertisement.rb
@@ -0,0 +1,66 @@
+class Advertisement < ActiveRecord::Base
+  validates_inclusion_of :ad_type, :in => %w(horizontal vertical)
+  has_many :hits, :class_name => "AdvertisementHit"
+
+  def hit!(ip_addr)
+    hits.create(:ip_addr => ip_addr)
+  end
+
+  def hit_sum(start_date, end_date)
+    hits.where(["created_at BETWEEN ? AND ?", start_date, end_date]).count
+  end
+  
+  def date_path
+    created_at.strftime("%Y%m%d")
+  end
+  
+  def image_url
+    "/images/ads-#{date_path}/#{file_name}"
+  end
+
+  def image_path
+    "#{Rails.root}/public/#{image_url}"
+  end
+  
+  def file=(f)
+    if f.size > 0
+      self.created_at ||= Time.now
+      self.file_name = f.original_filename
+      FileUtils.mkdir_p(File.dirname(image_path))
+
+      if f.local_path
+        FileUtils.cp(f.local_path, image_path)
+      else
+        File.open(image_path, 'wb') {|nf| nf.write(f.read)}
+      end
+
+      File.chmod(0644, image_path)
+    
+      image_size = ImageSize.new(File.open(image_path, "rb"))
+      self.width = image_size.get_width
+      self.height = image_size.get_height
+    end
+  end
+  
+  def preview_width
+    if width > 200 || height > 200
+      if width < height
+        ratio = 200.0 / height
+        return (width * ratio).to_i
+      else
+        return 200
+      end
+    end      
+  end
+  
+  def preview_height
+    if width > 200 || height > 200
+      if height < width
+        ratio = 200.0 / width
+        return (height * ratio)
+      else
+        return 200
+      end
+    end      
+  end
+end
diff --git a/app/models/advertisement_hit.rb b/app/models/advertisement_hit.rb
new file mode 100644
index 000000000..49988ce8f
--- /dev/null
+++ b/app/models/advertisement_hit.rb
@@ -0,0 +1,3 @@
+class AdvertisementHit < ActiveRecord::Base
+  belongs_to :advertisement
+end
diff --git a/db/development_structure.sql b/db/development_structure.sql
index c4aa790ef..780a59630 100644
--- a/db/development_structure.sql
+++ b/db/development_structure.sql
@@ -74,6 +74,75 @@ SET default_tablespace = '';
 
 SET default_with_oids = false;
 
+--
+-- Name: advertisement_hits; Type: TABLE; Schema: public; Owner: -; Tablespace: 
+--
+
+CREATE TABLE advertisement_hits (
+    id integer NOT NULL,
+    advertisement_id integer NOT NULL,
+    ip_addr inet NOT NULL,
+    created_at timestamp without time zone,
+    updated_at timestamp without time zone
+);
+
+
+--
+-- Name: advertisement_hits_id_seq; Type: SEQUENCE; Schema: public; Owner: -
+--
+
+CREATE SEQUENCE advertisement_hits_id_seq
+    START WITH 1
+    INCREMENT BY 1
+    NO MAXVALUE
+    NO MINVALUE
+    CACHE 1;
+
+
+--
+-- Name: advertisement_hits_id_seq; Type: SEQUENCE OWNED BY; Schema: public; Owner: -
+--
+
+ALTER SEQUENCE advertisement_hits_id_seq OWNED BY advertisement_hits.id;
+
+
+--
+-- Name: advertisements; Type: TABLE; Schema: public; Owner: -; Tablespace: 
+--
+
+CREATE TABLE advertisements (
+    id integer NOT NULL,
+    referral_url text NOT NULL,
+    ad_type character varying(255) NOT NULL,
+    status character varying(255) NOT NULL,
+    hit_count integer DEFAULT 0 NOT NULL,
+    width integer NOT NULL,
+    height integer NOT NULL,
+    file_name character varying(255) NOT NULL,
+    created_at timestamp without time zone,
+    updated_at timestamp without time zone
+);
+
+
+--
+-- Name: advertisements_id_seq; Type: SEQUENCE; Schema: public; Owner: -
+--
+
+CREATE SEQUENCE advertisements_id_seq
+    START WITH 1
+    INCREMENT BY 1
+    NO MAXVALUE
+    NO MINVALUE
+    CACHE 1;
+
+
+--
+-- Name: advertisements_id_seq; Type: SEQUENCE OWNED BY; Schema: public; Owner: -
+--
+
+ALTER SEQUENCE advertisements_id_seq OWNED BY advertisements.id;
+
+
 --
 -- Name: artist_urls; Type: TABLE; Schema: public; Owner: -; Tablespace: 
 --
@@ -1051,6 +1120,20 @@ CREATE SEQUENCE wiki_pages_id_seq
 ALTER SEQUENCE wiki_pages_id_seq OWNED BY wiki_pages.id;
 
 
+--
+-- Name: id; Type: DEFAULT; Schema: public; Owner: -
+--
+
+ALTER TABLE advertisement_hits ALTER COLUMN id SET DEFAULT nextval('advertisement_hits_id_seq'::regclass);
+
+
+--
+-- Name: id; Type: DEFAULT; Schema: public; Owner: -
+--
+
+ALTER TABLE advertisements ALTER COLUMN id SET DEFAULT nextval('advertisements_id_seq'::regclass);
+
+
 --
 -- Name: id; Type: DEFAULT; Schema: public; Owner: -
 --
@@ -1247,6 +1330,22 @@ ALTER TABLE wiki_page_versions ALTER COLUMN id SET DEFAULT nextval('wiki_page_ve
 ALTER TABLE wiki_pages ALTER COLUMN id SET DEFAULT nextval('wiki_pages_id_seq'::regclass);
 
 
+--
+-- Name: advertisement_hits_pkey; Type: CONSTRAINT; Schema: public; Owner: -; Tablespace: 
+--
+
+ALTER TABLE ONLY advertisement_hits
+    ADD CONSTRAINT advertisement_hits_pkey PRIMARY KEY (id);
+
+
+--
+-- Name: advertisements_pkey; Type: CONSTRAINT; Schema: public; Owner: -; Tablespace: 
+--
+
+ALTER TABLE ONLY advertisements
+    ADD CONSTRAINT advertisements_pkey PRIMARY KEY (id);
+
+
 --
 -- Name: artist_urls_pkey; Type: CONSTRAINT; Schema: public; Owner: -; Tablespace: 
 --
@@ -1471,6 +1570,27 @@ ALTER TABLE ONLY wiki_pages
     ADD CONSTRAINT wiki_pages_pkey PRIMARY KEY (id);
 
 
+--
+-- Name: index_advertisement_hits_on_advertisement_id; Type: INDEX; Schema: public; Owner: -; Tablespace: 
+--
+
+CREATE INDEX index_advertisement_hits_on_advertisement_id ON advertisement_hits USING btree (advertisement_id);
+
+
+--
+-- Name: index_advertisement_hits_on_created_at; Type: INDEX; Schema: public; Owner: -; Tablespace: 
+--
+
+CREATE INDEX index_advertisement_hits_on_created_at ON advertisement_hits USING btree (created_at);
+
+
+--
+-- Name: index_advertisements_on_ad_type; Type: INDEX; Schema: public; Owner: -; Tablespace: 
+--
+
+CREATE INDEX index_advertisements_on_ad_type ON advertisements USING btree (ad_type);
+
+
 --
 -- Name: index_artist_urls_on_artist_id; Type: INDEX; Schema: public; Owner: -; Tablespace: 
 --
@@ -1962,4 +2082,8 @@ INSERT INTO schema_migrations (version) VALUES ('20100215182234');
 
 INSERT INTO schema_migrations (version) VALUES ('20100215213756');
 
-INSERT INTO schema_migrations (version) VALUES ('20100215223541');
\ No newline at end of file
+INSERT INTO schema_migrations (version) VALUES ('20100215223541');
+
+INSERT INTO schema_migrations (version) VALUES ('20100215224629');
+
+INSERT INTO schema_migrations (version) VALUES ('20100215224635');
\ No newline at end of file
diff --git a/db/migrate/20100215224629_create_advertisements.rb b/db/migrate/20100215224629_create_advertisements.rb
new file mode 100644
index 000000000..4e0c31972
--- /dev/null
+++ b/db/migrate/20100215224629_create_advertisements.rb
@@ -0,0 +1,20 @@
+class CreateAdvertisements < ActiveRecord::Migration
+  def self.up
+    create_table :advertisements do |t|
+      t.column :referral_url, :text, :null => false
+      t.column :ad_type, :string, :null => false
+      t.column :status, :string, :null => false
+      t.column :hit_count, :integer, :null => false, :default => 0
+      t.column :width, :integer, :null => false
+      t.column :height, :integer, :null => false
+      t.column :file_name, :string, :null => false
+      t.timestamps
+    end
+    
+    add_index :advertisements, :ad_type
+  end
+
+  def self.down
+    drop_table :advertisements
+  end
+end
diff --git a/db/migrate/20100215224635_create_advertisement_hits.rb b/db/migrate/20100215224635_create_advertisement_hits.rb
new file mode 100644
index 000000000..578dcc6c6
--- /dev/null
+++ b/db/migrate/20100215224635_create_advertisement_hits.rb
@@ -0,0 +1,16 @@
+class CreateAdvertisementHits < ActiveRecord::Migration
+  def self.up
+    create_table :advertisement_hits do |t|
+      t.column :advertisement_id, :integer, :null => false
+      t.column :ip_addr, "inet", :null => false
+      t.timestamps
+    end
+    
+    add_index :advertisement_hits, :advertisement_id
+    add_index :advertisement_hits, :created_at
+  end
+
+  def self.down
+    drop_table :advertisement_hits
+  end
+end
diff --git a/test/factories/advertisement.rb b/test/factories/advertisement.rb
new file mode 100644
index 000000000..a93d641b1
--- /dev/null
+++ b/test/factories/advertisement.rb
@@ -0,0 +1,8 @@
+Factory.define(:advertisement) do |f|
+  f.referral_url "http://google.com"
+  f.ad_type "vertical"
+  f.status "active"
+  f.width 728
+  f.height 90
+  f.file_name "google.gif"
+end
diff --git a/test/unit/advertisement_test.rb b/test/unit/advertisement_test.rb
new file mode 100644
index 000000000..98b545da9
--- /dev/null
+++ b/test/unit/advertisement_test.rb
@@ -0,0 +1,16 @@
+require File.dirname(__FILE__) + '/../test_helper'
+
+class AdvertisementTest < ActiveSupport::TestCase
+  context "An advertisement" do
+    should "create new hit records" do
+      ad = Factory.create(:advertisement)
+      assert_difference("AdvertisementHit.count") do
+        ad.hit!("0.0.0.0")
+      end
+      assert_equal("0.0.0.0", AdvertisementHit.first.ip_addr)
+      assert_equal(1, AdvertisementHit.first.advertisement_id)
+      assert_equal(1, ad.hit_sum(1.day.ago, 1.day.from_now))
+      assert_equal(0, ad.hit_sum(2.days.ago, 1.day.ago))
+    end
+  end
+end