How many social networks can one person join?

[snookumsnort]

I heard them discussing Twitter over the radio today and I'm thinking "TWITTER?!? There's a new social networking site again?" I have friends who are members simultaneously of Friendster, Multiply, Facebook, Flixter (or some similar sounding site) and Reunion. How many do you think can you manage? I'm already overwhelmed with Facebook as it is....

[Binkleywalker]

I used to use ICQ, until I forgot what the answers were for those dumb questions they make you fill out to retrieve an old account (this was way back when I got a new computer). Don't really bother with any nowadays myself. I guess if I develop a need, I'll figure something out.

[CopyCat]

I am a member of most of the sites mentioned above, but I never go to them to socialize...
I just use these sites as a research tool to find out more about people I meet on other sites...
Sorry I just don't have the time to sit around and chat for hours although I probably would if I could...