I ran across this beta site through links today, thanks to @LouisGray and @LeoLaporte for the first hints. The first thing that caught my eye was grouping!!
This finally takes Twitter to yet another level with some great features:
Additional Features
- - Catch up with overnight global twitterings as TweetDeck stores all updates whilst running
- - Continual status updates of TweetDeck and Twitter
- - Resize TweetDeck as either an unobtrusive column, full screen or anything in between
- - Especially useful running full screen on a separate monitor
- - Filter tweets from up to 1 hour to the last 7 days using the Timeframe bar
- - Auto updates from the Twitter API
[...] follow real-time updates of keywords. It is all web based so no client download is needed, like TweetDeck (view a TweetDeck and Twhirl comparison here on Mashable) would [...]