I'm the kind of person, if I see something, like a funny video, I want to share it. With Twitter and Tumblr you can do that on a mass scale, and people get to know your personality.

Every day I am being told to sign up for Tumblr, Yammer, Friendfeed, Plaxo, Last.fm, ping.fm or the hot social-media tool du jour that happened to get mentioned on Mashable.com. It is like a social-media arms race. Each one of these new tools is like a cool new night club. Hot today, gone tomorrow, replaced with something else.