One more thought...
I reread your original post and you never mentioned whether you need OSX and/or classic support. If you're willing to go to OSX and just run pre-X in Classic Mode, consider a Mac Mini. It will not only fit under a bed, it will fit in a lunch box. The G4 Mac mini ranges in speed from 1.25GHz to 1.5GHz and will take 1GB of RAM. It won't boot with OS 9.x though. But talk about compact....
There's no expansion, so if you need a special card or something, it's not a good choice, but if you just want a usable compact desktop computer with excellent performance, it is a great choice.
I reread your original post and you never mentioned whether you need OSX and/or classic support. If you're willing to go to OSX and just run pre-X in Classic Mode, consider a Mac Mini. It will not only fit under a bed, it will fit in a lunch box. The G4 Mac mini ranges in speed from 1.25GHz to 1.5GHz and will take 1GB of RAM. It won't boot with OS 9.x though. But talk about compact....
There's no expansion, so if you need a special card or something, it's not a good choice, but if you just want a usable compact desktop computer with excellent performance, it is a great choice.