I definitely respect any Noiser trying to extend the life of their gear. Personally I hate to throw out something that can be used differently. Go green or go home or something.
So basically I have two, Apple G4 Cubes at home and I don't want to throw them out but I have to find a use for them (the Mrs. wants to buy me a new iMac/Mac Pro, but we really don't have room for the two Cubes). Any easy DIY projects for an old Power PC based Mac?