The Tweep of the Week featurette hasn't been updated in a very long time. The reason for that is pretty simple--I just don't tweet much anymore. The majority of my Twitter activity took place during the experiment described in the book, and while I kept it up for a while after the book came out, I quickly realized that one grows tired of all the bashing and trolling. So I found other avenues.
Having said all that, most of the tweeps described in my original entries are well worth following (if you're so inclined). But for the really, really fascinating tweets you'll have to buy a copy of Chasing Glenn Beck.