"I see a nifty little utility that, at its best, makes it easier for me to keep in contact with people I know and like, but don’t really care about enough to just hang out with, IM, or call."
The people I really keep in touch with is over email, IM and the phone (or, heavens forbid, hanging out in person). Facebook is an interesting diversion, but I have trouble seeing myself using it in 5-10 years (unlike Google, which I consider a basic utility).