What do you use? What do you like or dislike about them?
So far I'm on a few - I like them mostly for a way to stay in contact with my acquaintances. My friends I stay in touch with through other (old-fashioned) means, but these seem to do a reasonable job of locating folks I've lost touch with, or folks I've worked with in the past.
So far I'm on:
Myspace - I don't use it much at all - too much spam, and completely focused on the social aspects.
Facebook - Academic & social focus (duh!) but seems to be expanding. Since I've been in an academic setting for the last two years, and want to return as faculty one day, it's not a bad way to stay in touch with other students and faculty.
LinkedIn - Professional Focus - so far I'm digging it for the opportunities for networking.
Plaxo Pulse - New, in the beta stage. Seems to be trying to mix the social & professional tracks.
Thoughts? Should we add a "Cyburbia" group on any of these?
ps - If you're interested in connecting to me through one of these means, let me know.