Rated 4 out of 5 stars
I'm a 64-bit Ubuntu user and was looking for an aggregating client to manage my Twitter, Facebook and Linkedin messages and went through just about all the popular add-ons. I liked Yoopa but it gave me blank, black boxes instead of notification bubbles.
HootSuite works great - if you want a powerful all-in-one package, then go for this.
Any improvements? Yes, I'd like to be able to rename the tabs. I have three with the same login name. Confusing so minus - star!