Web app like this

We need a web application to be developed similar to: [login to view URL] Similarity is only in functionality not the design. Bidder must be proficient in AJAX, PHP and design skills. Website must feel like a web 2.0 site Database would be MySQL. Further details will be shared with bidders. We already have domain and server setup. There would be lot more work on this after this. Preferably potential bidders should be easily available for communication.