- get spca5xx-source.
- enable v4l in your kernel if it's not there already.
- unpack /usr/src/spca5xx-source.tar.bz2, create the kernel module with module-assistent (m-a prepare; m-a a-i spca5xx).
- modprobe spca5xx.
- well, that's all. use the cam (/dev/video0 or similar) with qtwengophone, camstream, gqcam, or (nice!) camE. — webcamd (or xawtv/v4lctl) doesn't like it.
- for the microphone you need snd-usb-audio in your kernel; then use /dev/dsp1 or hw:1,0 or similar.
& today tony mancill has uploaded jabref — thanks!