Dont fear. Powerpc is STILL used in the market place. The Xbox 360, PS3, and Wii all use powerpc chips. Powerpc is supported in the main Linux kernel (as is 68k). I am a linux user. You know, most applications are written in c or c++ anyway, so you could compile them for whatever architecture you like. Debian has official precompiled binary support for a number of archs. I prefer something like gentoo where you compile everything yourself. It has the advantage of having NEW versions of programs, plus you get all the optimisations for your specific computer.