The USB speakers are holding up well, they make the whole desk tremble, and, as I was asked, they use about 2-3% CPU, MP3 decoding included. But this machine is a 2.5 GHz P4. I wouldn't use those on my PPC machine. What's bizarre is that one of my soundcards is using OSS and the USB speakers are using ALSA... Now that will make it easy. Damn.