Facebook, Layout;
1) IM bar
2) Wall with Check-in
3) Pages/Groups -- Not just Groups
4) HTML 5 Video Chat That does not use Rays
5) Better Forums - as it hard to understand the forums as it is now, maybe something like Mybb or VB/etc
6) bring back license old license, lower the cost dang, not every one is rich -- there are starters
7) mobile app should be free and paid.. it's like how you do it on here, by adding ads and links and using popups as you did before
8) CSS for members page. LIke myspace use to use CSS 2.0??
Better mobile web theme, as it does not look like it on your main site? unless thats the app it self..
i will post more, as i can think.