This example shows how you might have a page of references to different Twitter people, based on some subject that they all have in common. At the moment we just show their latest Tweets, but we could easily provide a link to allow people to follow them:

If you're interested in RDFa you might consider following Mark Birbeck (@markbirbeck), Ben Adida (@benadida), Shane Maccarron (@halindrome), and Manu Sporny (@manusporny).