My brother-in-law did some cool DJ stuff at a wedding once - it involved using a Linux box and a custom-written visualisation plugin for XMMS that would drive a laser show thing to the beat of MP3's stored on a CD.
It was pretty good, with different pcitures being drawn and also a motor to control the disco ball RPMs!
This was all done on an old P166 laptop as the PII-300 that was supposed to do it couldn't boot to Linux as a Windows virus had nuked the boot sector!
There was no fading or any of that stuff, but it was very impressive that the Pentium did so well - I guess it has the FPU that the StrongARM lacks....