Not only no but HELL NO!
I have a hard enough time keeping up with friends in town, I don't have time for that. Besides, what is wrong with e-mail or a phone call if you want to stay in touch with old friends?
Actually for me the main reason I have no interest is because there is no way I am letting my teenage boys on there and I am not going to say it is ok for me and not for them. I try my best to live my life the way I expect them to live theirs.
Just curious, all those who say they like it to find old friends and the like, did you ever pay for classmates.com? (No, I don't do that either, I like my semi-anonymity on-line).