Its an application that combines Facebook updates with your Twitter ones with the ability to filter and display specific searches all at one glance.
Recommended for anyone who tweets and checks facebook updates regularly. This one does it all for u in one screen without you needing to hit the refresh button.
TweetDeck
http://www.tweetdeck.com/beta/
How To Use Tweet Deck Like A Pro
http://www.gissisim.com/2009/03/how-to-tweet-deck-like-a-pro/
cool, i use the firefox extension “Twitterfox” at work. even set it to give me an audio alert when i get a tweet.