i think i just put my name on social nets so it's taken, i'm not that enthused about it.
i also have the feeling i don't take it as competitively as some others do, i don't look for people i would never speak to, and ask them to call themselves my friend. (there's some exceptions, i just enjoy having felicia day as a friend, even though it's a non-reciprocal friend -- i'm a sucker for smart redheads.)
i have about 20 ppl (high school, university, work colleagues),
my older sister has about 350,
younger stepsister, about 200 or so.
my older stepbrother, who just had a baby girl on tuesday, has about 50 on his page.
as for school contacts, i don't mind not having them in contact, but it's good to know they are still alive or married, divorced, travelling, doing things, etc.
i think it's the people who aren't on there, that worry me a little, since i have the feeling some of them should be online, but they aren't.