The neat thing about knoppix is you can DL the ISO image, burn a CD, and boot the CD. You don't have to commit to installing Knoppix - you can try it out on any machine with a fair amount of RAM. I've booted it from CD on something as minimal as a 6 year old laptop with 192 MB of memory, and a blazing P-III at 800 Mhz. ;-)
I tried beryl out on a 2.8 GHz P4 with 512MB - very nice.
Thanks. I think I will open up a torrent on 5.1.1