writes "According to this arricle at AppleInsider Apple will show their second generation 500Mhz dual G4 boxes at the MacWorld Expo this January. The same article also says that Apple is working on quad-processor boxes. "
It'll be pretty sweet to have another SMP capable platform for Linux to run on. Update: 12/27 09:30
: If you don't want to wait for Apple's solution, try this dual G4 board
and roll your own.