I’m sitting here snuggled up in bed with my PowerBook, with a long cable going half-way across to the room to my stereo. (It’ll be awesome once my AirPort Express arrives. :D). The PB also does an excellent job as a heater. 😉
Also, I’m considering getting one of these so I can still use my G4 tower. It’ll also be handy to be able to have it plugged into my PowerBook as well.