I really enjoy MySpace - more so lately, I admit. I finally put a background on mine, vs the standard blah layout lol:
http://www.myspace.com/lynnterry . I've made some great friends, met some locals, and chat it up with all the teens in the family.
Of course, I network with quite a few IM'ers on MySpace as well, and its been a great place for more laid back contact and communication.