Tweetdeck now has a configuration that allows you to type more than 140 chars and it will use it's own Deck.ly to send reader to a URL where they can read the entire message.
Tweetdeck v0.36.1 now offers real time tweet streams where information flows in real time instead of at polling intervals, how many can keep up with real time tweets?
TweetDeck added Scheduled Tweets several days ago though the feature was glitchy a few days. Tweetdeck adds Buzz and Foursquare, read my Tweetdeck review!
TweetDeck now supports Twitter Lists, LinkedIn and both old style and new style retweets. In addition they now include Geotagging for locations.