The 
Experience
Be a participate in the Twitter Experience.
A
Twitter Influence Analytics.
Popular
content on Twitter, Del.icio.us, YouTube, Likehacker, Mashable, Digg, and others.
A full
featured Twitter Client called HootSuite
2.0.
Watch the video tour on the Hootsuite
2.0 website.
TweepSearch let's
yousearch friends and followers, or just a keyword to search all bios currently indexed.
- Tweetdeck Has New Features!
- TweetDeck is your personal browser for staying in touch with what’s happening now, connecting you with your contacts across Twitter, Facebook and more.
- TweetDeck shows you everything you want to see at once, so you can stay organised and up to date.
DoshDosh blog has an article on "Twitter Marketing: Why You Don't Need to Mass Follow Users", that explains their strategy on how to work Twitter to your advantage without automatically following or trying to follow in mass numbers to get a few results.
Check out these Top 10 Twitter Backgrounds at Twitterbackgroundsgallery.com.
Another great Twitter search tool found called Twazzup. Has some nice features on searches, especially searches by twitter username. Try it out.
I found a new UnFollow tool called "UnTweeps" that Unfollows Tweeps who have not posted Tweets recently. You can list tweeps you are following who haven't updated their status in 30, 60 or 90 days. It lists them out and you can check or uncheck the ones you want to UnFollow. I have tried this tool and it appears to work nicely.
Ingrid Fuller's Latest Twitter... using Twitsig:
