At cnet is a post about New versions of Tweetdeck, Seesmic square off.
I use Tweetdeck and there are two new features that I look forward to, synchronization and multiple account support. Synchronization means you do not have to recreate groups and search queries on other computers if you use Tweetdeck on several ones. I have several Twitter accounts and it will be nice to manage all with Tweetdeck.
