I am looking at creating an application for facebook business pages (e.g. restaurants).
There will be a sign-up page (to identify th business as having access to our system and to pull the appropriate content, and then, based on that, we will be displaying content under a new tab.
To determine feasibility I need to know the maximum width allowed for the iframe in which we can display the information (not critical for sign-up process). I noticed that the page layout varies under different facebook tabs. Can one choose that when integrating the iframe?