Hey folks, here is a Facebook game I have built (my first) - http://apps.facebook.com/stonesnroses/. Its a simple shooting/action game that also captures all the engaging features of a social game. Would love to hear from you about the game (good? bad? ugly?).
Its a HTML 5 game built using the open source library - http://processingjs.org/. Great thing is that you can write java like code and convert it to javascript using Processing.js