Other people I know have used it to reconnect with old friends and/or get laid.
I was on for a bit... found it to be generally useless unless you are looking to hook up with old girlfriends, FB friends' wives or random lonely people trolling other people's friend lists. Since my own wife generally frowns on me doing that sort of thing... I'm off.
Almost everyone I actually call "Friend" I communicate with by email/phone or I visit them so I really do not miss instant access to other people, mostly acquaintances, trivial crap. Knowing Bob from the beer store "Just had a good E36 M3" isn't really that important to me.
I do have a rockin' smart-phone though.

