I've less than zero interest in linking SL with FB or Twitter, or in having featured like them in SL. Better linkage to Google Calendars would be nice. Other than Google Calendars and being able to rationally tell somone inwolrd when I'll be on, I'd just as soon NOT have SL and RL linked up at all. The two worlds have very little to say to each other, and a lot not to say.
Making it easier to find out who's currently performing live inworld is about the only additional social netwroking I'd be interested in. Anything else would just be a bother and in the way.
Also....the 2.0 outfits feature was pretty good before they started improving it...now it sucks. The lack of folders makes it unusable.
I stopped using AU pretty fast. It didn't offer anything useful.