Coupon Directory

I am looking for a simple web directory site that will allow users to share online coupon codes. The directory should be search engine spider friendly. Expected function. 1. When a user wants to submit a coupon, he will select the main category, example computers. Sub category hardware, and then with in the category he will select hard disk. Here he will post a headline, brief description of the product. Thumbnail view of the image (only gif and jpg images supported). And a link to the page they are sending. And a section to ad the coupon code. In order to post your coupon, you don’t have to be registered, but email verification is required. User will type his email which will be sent to him then he will click on a link to confirm. To prevent bots from posting , we will also need a captcha verification. 2. Visitors visiting the website should be able to rate the coupon. Coupons that receive more positive feeds will be ranked on top and the negative being at the bottom. Top 100 coupons will be listed on the home page above the directories section. 3. visitors should be able to search the whole site using simple keyword search. 4. Admin section should allow the admin to ad or remove categories, block users, edit user logins and regular site maintenance. 5. admin will be alerted via emails and when he login to the admin section about flagged coupons. These will be coupons that receives more than 10 flags. 6. To prevent abuse visitor can only flag 10 coupons every hour. System should track ips to do this. 7. site will be ad supported and we will discuss in detail where and how the ads will be presented. We require a nice professional looking user interface. also the site should be able to scale to support 1000 visitors per hour and database should be able to hold over 10 million coupons. Please contact us with your details.