Fastweet is a twitter client designed for all twitter addicts, and is focused on reading through tons of tweets without stress.
Features:
* Zen-like simple and polished user interface
* Always keeps tweets very up-to-date (latest 200 tweets)
* Renders Web pages via Google Mobile Gateway for a quick look
Full-featured version "Fastweet 2K" (up to 4000 tweets!) is also available.