Popular desktop Twitter client Tweetdeck has announced the availability of an iPhone version of the software. The news follows Digg founder Kevin Rose reporting on his blog that he had a beta version working.

It features the same column-based structure as the desktop client, and syncs with its big brother too, so you'll know what tweets you've already read.

If you're a Tweetdeck user (we're not, we prefer Twhirl's simplicity) then you can get it right now. It's free. At that price, it'd be rude not to give it a shot.