I like Bitlbee. I use it to monitor both Twitter and StatusNet (formerly known as Identi.ca or Laconica). Problem is that, by default, Bitlbee generates the IRC channels by combining your username and the protocol employed. Since both services use the Twitter protocol, you end up with IRC channels named "twitter_packetgeek" and "twitter_packetgeek_".
While most documentation will say "live with it", it's an easy to fix problem. Switch to the Bitlbee command channel (&bitlbee) and type "rename twitter_packetgeek twitter" (substituting your info for "twitter_packetgeek", of course).
A screenshot of mine follows. Click on it to see the larger version.