Update Aug 25, 2010: After 3 1/2 months of using Yoono, I've removed it from Firefox. It had a tendency to crash Firefox, particularly if it contained a lot of unread messages. In addition, it quit updating my Facebook feed, except for notices, around the 1st of August. I've switched back to TweetDeck and Trillian.
Earlier this week I installed Yoono's (Yoono.com) Firefox Add-on, as a test to see if it can successfully be used to manage all my social networks. Today I removed my other client tools from my auto-start, as I have been very happy with Xoono.
As I mentioned, Xoono is a Firefox Add-on (it's also available for Windows desktop) that you can use to manage all my social network interactions. It supports Facebook, MySpace, LinkedIn, Twitter, Flickr, FriendFeed, and 4 instant messaging (IM) clients: AIM, Yahoo, Google Talk, and MSN. Each of these can show in one feed or you can select a tab to see the individual feed. I have been using 3 of the social feeds (Facebook, Twitter, and LinkedIn) and 2 IM clients (AIM and MSN). So far I have been very pleased with the easy of use and functionality. I have not used it with multiple IM sessions going at once.
Since it's a Firefox Add-on, the feed window is a left side-bar within the browser. It has a collapse button too, when you want the extra screen real estate. When collapsed, it displays the number of unread messages. With the 7 different skin colors, I found it easy to pick a color that is distinctively enough different from my browser skin to standout, but the palette choices are pleasing enough as to not be distracting.
When posting, you can post in one feed or all feeds. If you were in the All Feed tab, by default all the feeds for posting will be selected. Likewise if you are in a single feed tab, just the single feed will be selected. You can add and remove feeds through a simple checkbox.
I could go on about the many features, or you can visit the Yoono website and check it out for yourself. Needless to say, right now I think I've found a great new tool.