Aistee,
Thanks for the list and ranking of all the Twitter tools!
I'd like to initially add LivelyBrowser to your list -- even though it is a pay for tool. Lively is a BHW member AND has the best tool on the market. I even prefer it to Hummingbird.
Given all the Twitter activity, and knowledge, I think we should have a dedicated Twitter area.
Your post proves that Twitter is *the* thing at the moment -- and at least for 2-3 years to come.
If Oprah is Tweeting... then we now have the *perfect* demographic for our needs!