Tweetdeck is just about my favorite twitter client. It offers columns of information which are user customizable including your feed, another person’s feed, @replies, and searches (a must!). However, this is not my favorite client-that spot belongs to Twhirl, but this would easily be my favorite if Tweetdeck supported the TWiT Army and not just twitter. Get it for free from tweetdeck.com.
This Twitter client, like many others is based on the Adobe AIR platform meaning that one version works on many platforms, for an updated list of these platforms check Adobe’s site.
[UPDATE Feb 23, 2009]
Cali Lewis of GeekBrief.tv has made a great Tweetdeck “Like a pro” episode.
Geekbrief.tv Episode #517