Fastweet 2K 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 4000 tweets)
* Renders Web pages via Google Mobile Gateway for a quick look
Free version "Fastweet" (limited to 200 tweets) is also available.