I haven't played with any linux distros in a long time. When i get some time, i'll get one of the music ones and play around with it, see how they are coming along.
I have always liked linux, just had trouble getting some of the music apps working, because navigating the OS with the terminal was about as far as i got and many didn't at the time have user friendly GUI's.
I had Demudi and a a few others, then i started using a Fedora from CCRMA at Stanford University's Music Dept, administrated by Fernado Lopez, kernel optimized for low latency, which was great, but when i discovered GPO and Finale, i kinda abandoned Linux and went back to Windows, then Mac.
Here it is if anyone interested, they are still running i see: http://ccrma.stanford.edu/planetccrma/software/
It has the optional Debian style Aptget to retreive the applications, which is much faster than installing RPMs, if you don't mind working from the terminal.
I don't do any audio stuff on Linux, but I use it as both a server and a development platform (right now I'm working on some IPv6 stuff using SNORT). I'll be very interested in watching the audio side of things via the forum -- I've been doing PC-based music since the DOS days with Cakewalk, I've never seriously considered trying to switch because of the time and money I have invested in PC software.