This is your webcam:
05a9:2640 OmniVision Technologies, Inc.
Looks like you need the Berlios driver. On the kernel Mandriva 2008 I *think* that driver is installed as my Logitech 5000 cam is just recognised, so maybe either 126.96.36.199 would work or get the Berlios driver compiled and installed. It's not too hard to get going, I had to do it for 2007.
It will show up as something like /dev/videox - the above linke shows /dev/v4l/videox (where x= a number). I'm guessing
different ditros show it slightly different.