Digsby is a multi-im client along the lines of Trillian, Pidgin, and the Meebo. Use Digsby to organize your IM chatter. Through a single application/interface, you can ping all your friends on the big IM services (AIM, YIM, MSN, GTalk, ICQ, Jabber). They kick it up a few notches by supporting Twitter, Facebook, and MySpace social services. They kick it up another notch by supporting email as well: gmail, ymail, msnmail, pop, imap accounts.
Updates and notifications from all these services arrive on the desktop in bubbly status messages that appear even if Digsby is minimized. You can even reply to a message by typing in the status bubble.
I love the way this blurs the boundaries between all these communication channels. A message could arrive from a person (who cares how it got here), my reply bounces back through the same channel.
Here's another way Digsby is pushing envelopes with their service. A few clicks will let you set up a widget that you can embed in your various web-hangouts, blogs, facebook account, etc.
Digsby does a stellar job of running their project with transparency and input from their users. They've managed to build a close relationship with an active user community by using all the social resources available. They go far beyond the requisite blog (even if they brag about the strange bugs that turn up in their public testing cycles). Users have a channel to reach Digsby via twitter, to get involved with an active developer community (also on twitter incidentally). The steady drumbeat of prioritization from regular public roadmap polls has kept Digsby on track to satisfy users. On top of all this, they've built in a great alert/warning system that lets folks at digsbyhq push status message out to all users ('twitter is having trouble today').
Kudos to their team involved with support and outreach. If I were running a customer-facing service, I'd likely use Digsby to manage the customer contacts. I wonder if they're eating their own dogfood over there at digsbyhq?
There are a few caveats of course. Because what software is perfect? Digsby does not yet support IRC or Skype chats. As far as I can see, the multi or 'room' chat features aren't supported on any of the IM services. All of these features are on their roadmap.
Digsby is ready for primetime and worth a try.