Social Media Vanguard

Thanks to Daniel J. Pritchett for including among his Social Media Vanguard.  I have found social media to be a good tool to promote and communicate what's happen in the city, in technology, in entrepreneurship, and in my life.  I believe that if you give people concise information that is relevant, they will act on it.

Here is the blog post from Daniel.
http://www.sharingatwork.com/2008/09/social-media-vanguard.html

Are you using social media?  Why or why not?