Good stuff! I run a dual boot IBM T20 at work with a 700MHz PIII. I use Linux most often but I need XP for work sometimes. I don't have any problems either even though I run the latest KDE on Debian unstable.
2x533MHz@544MHz, 2.0V
640MB PC100 memory
Realtek RTL-8139 NIC
Maxtor 6Y080L0 80GB hdd
Debian Linux stable with 2.4.8 kernel