Tweetie is a great iPhone App.
It has all of the features you’d come to expect from a Twitter client. Most importantly it allows you to manage and post to multiple Twitter accounts.
After you log in you’ll find four main buttons: Tweets, Replies, Messages, and Favorites.
Each tab shows you 20 results at a time, but you can see more with a single click.
You can do a lot with this Twitter app including viewing reply chains, see links directly in the browser, retweet messages, turn links in the browser into short …