There is a growing community of security folks on Twitter. Not sure what Twitter is? Ask Wikipedia. Just don't ask why. Twitter is an addictive little thing, and some people really like it- including me. Chris Hoff and I Twitter-cast coverage from Shmoocon last weekend and I expect to do so again for relevant events, such as RSA. I'll add a Twitter widget to the blog for such events in the future, but it will probably only be active for specific events. If you really want to see all of my updates on everything from traffic and weather to caffeine and alcohol you'll have to follow me on Twitter.
Jennifer Leggio's blog has the definitive list of Security Twits. Not sure I really like that name, though. It make it sound like we're Steve and Leo's minions.
Note: as Twitter users all know, Twitter is the MG of social media sites. That is, it is lightweight, nimble and fun- when it works. Just like an MG, Twitter's lack of reliability is legendary. (I didn't even know Lucas made web servers).