Facebook app

Hi, I was curious of the associated costs to build something like Chess Pro ([login to view URL] ) that is currently available on FaceBook. Though this is built in Flash, I was looking to have it built in AJAX. For example, we can use an open source AJAX chess board similar to this: [login to view URL] Here is an example of an AJAX based game [login to view URL] [login to view URL] I was considering having the same features as Chess Pro but also going with a timer option like in speed chess where a user has 5 or 10 minutes to play the game.