Yes it’s true with the new release of TweetDeck 0.34 you can create a filter to hide any messages that include “Bieber” or “Twieber.” I am sure it has other uses but that sounds like the best one 
sorry Justin. You can see a complete list of new features here or just download it and press all the new buttons like I do and see what happens. (who needs instructions correct?)
Main New Features
- Update Twitter, Facebook, MySpace, LinkedIn and Google Buzz
- The new version of TweetDeck also adds support for Foursquare, enabling users to view updates, see venue information, check in from a venue and more.
- Tweetdeck also now supports custom URL shorteners, better video upload and scheduled updates.
- You can now schedule updates to check-in or post a message in the future
- Upload videos using TweetDeck and the video service TwitVid
Check out the video for an overview
