Hm, it certainly is new to create a twitter-account to coordinate a bot-net, but on the other hand... why should communicating via a public, active (and slow) site be better than communicating via some little known (or even private) IRC-server?
What exactly is the advantage of using Twitter for C&C? It's trivial for Twitter to suspend accounts like this (which they already have done: <a href="http://twitter.com/upd4t3" rel="nofollow">http://twitter.com/upd4t3</a>), it just makes their job a little harder.
This was demo-ed two weeks ago at defcon, its probably using the same thing KreiosC2<p><a href="http://www.digininja.org/projects/kreiosc2.php" rel="nofollow">http://www.digininja.org/projects/kreiosc2.php</a>