Debian was a complete dick on my old ppc g4. It sort of put me off. The was going to try FreeBSD but I have to persuade the wife to let me buy a g5 yet as they're large, noisy and entirely unnecessary. I just want one to play with and go ooh and aah and stuff :)

I did the same with old SPARC kit a number of years ago too.

PPC Debian runs just fine on my old Mac Mini. I could replace the thing, but it just keeps chugging on.

Time to have another bash I think. She might take to a G4 Mac Mini over a full sized G5 as well ;-)