Actually, you can follow all three of us -- Jack, June and Valdis -- on Twitter!
Twitter is a micro-blogging platform -- one and two sentence posts -- which allows you to quickly share ideas and discoveries on the WWW.
Twitter's original idea was that people post answers to "What are you doing?" I like to answer the questions "What are you interested in?" and "What are you paying attention to?" I tend to follow people that answer similar interest/attention questions in their tweets [posts to Twitter].
Here is a quick intro to Twitter and some musings about network mapping of Twitter data. The graphic below shows part of my Twitter graph in the first month of use -- who follows whom.