Multi-player flash trivia game

Hi bidders: We are looking for a multi-player flash client/server game solution that is similar in design to the following (but unique in detail, graphics, and display elements. ): [login to view URL] (click on any of the "game rooms" from the page above to see the flash app). You would provide: - The flash client, that players use to play. - Any server backend required to serve up trivia questions from our database, handle user chat, keep scores during a game, etc. It must: - be able to support multiple "rooms" and 500+ players. - grab trivia questions / user information from a mysql database. - store results back to the database at the end of a game. If you plan on using a commercial flash multiplayer API / platform, please let us know which one you have in mind. We can provide complete project details shortly. Right now we are just interested in ballpark figures for what you believe such a project would cost, and whether you have completed similar multi-player projects in the past. Thank you.