I am developing a facebook game. this game is written in php/Jquery/CSS. Up until recently, facebook games have been display in an iframe that was 720px wide. But recently, they gave the option to have a fluid layout going as wide as the user's screen. I would like to use this option and make my game go the full view of the user's screen.
Problem: The snag i came to is trying to decide the min-width to set my game to. I attempted to search the internet for most common screen sized people use to play facebook games but got nothing. I know that for a general web page/web app i must plan for all screen sizes from a small netbook to a colossal monitor. I am only concerned about the small end of the scale for this game.
Question: Should i still plan for that drasitic of a screen difference for my game? -or- Is there a min-size that is an industry standard for facebook games? -or- Should i keep facebook's old 720px wide as my minimum?
Any Help is greatly appreciated!