I was slow warming to twitter, but really I've found that there's a pretty huge overlap between my LinkedIn contacts and my Twitter followers. It's largely my online-geek-entrepreneur persona and it's a nice way of letting other folks in the world keep tabs on what stuff we've got coming down the pipe and doing the same for other startups / geeks.
Available in full flavor and low fat:
http://twitter.com/scotchi
http://twitter.com/directededge