This is one of the best Twitter clients available.
"Tweetbot is a full-featured iPhone (and iPod touch) Twitter client with a lot of personality. Whether it’s the meticulously-crafted interface, sounds & animation, or features like multiple timelines & smart gestures, there’s a lot to love about Tweetbot."
What people are saying:
“I’ve tried every iPhone Twitter client in the App Store, and Tweetbot is my favorite, hands-down.” - John Gruber, Daring Fireball
“Tweetbot puts a lot of useful Twitter features at your fingertips with the high level of style and polish that only Tapbots can provide. It's my new favorite client.” - David Chartier, Macworld
Deal found in appshopper.