Add what FB use, such as GOIP, maps, and check-in, real time chat, real time feeds like post and post as groups, think what FB as and make it more better out of it..
new
1: new feeds ( real time updating )
2: real time chat, when they saw it last - time and date
3:level system mapping, ( Check-in, who they are with, and so on)
4: post as group like on home page.. ( meaning, if i was "company" under my normal profile, i can use the drop down menu to post as group "company" then my self.
5: ajax, and bootstrap, as well make lot of apps, API and APIv2 as google is removing API1, from what i saw