I have been running Mandrake9.0 on both my file server, and a laptop (P166MMX) for about 6 months now, and both machines are very usable, I must admit the laptop struggles a bit in the GUI's but if I run it in 'console' mode it is just fine.

9.1 is now downloaded, all I need to do now is burn the CDs and install them on my main machine, so that looks like it could be another job for the weekend