It's about time! I've been waiting for the Linux client to come out for like 3 years now!
This page has been live since I first discovered digsby, afaik: http://www.digsby.com/signup/maclinux/?os=linux
I'm completely indifferent to the whole switching of the interface, but can definitely see where you guys are coming from. I barely used the old chatbox since I've connected my FB account into Digsby, in which I also connected my AIM account and my email.
Hope this helps you guys out.
Digsby is a very good replacement. it has better UI than pigdin
but while running the installer, make conscious choices. it installs crapware for default next ...next ..otherwise.
you may need to create a digsby account which saves the all encompassing accounts info.
Another alternative is using a program called Digsby, It works as a separate application from your browser (like Skype or AIM), and you can link multiple chat accounts to it. I use it for facebook chat and AIM (whomever still uses it lol). Pretty nifty little application :)
Give http://www.digsby.com/?utm_campaign=vid&utm_source=vid&utm_medium=vid&utm_content=vid a try. My brother loved it for a long time. Otherwise I recommend Pidgin http://www.pidgin.im/ from personal experience.