Strange that you don't have your x3100 working. Are you booting to 64 or 32bit?

As for the webcam, it may be working, but you probably need video acceleration to see the video. I have x4500, and it seems to me that this is the case as the webcam LED lights up, like it's on, but I see black square where the video should be.

---

Fujitsu Siemens Amilo Pi 3525 (Snow Leo 10.6.2 Hazard distro)
C2D T5800 @ 2GHz; Chipset: Intel G45 Cantiga; 3GB DDR2; Kingston 64GB SSD
Realtek 8169 (from Realtek's site); Intel WiFi 5100 AGN not woking; ALC 662
VGA: x4500 working with dual display (DVI2VGA dongle + VGA cable for Samsung 223BW) with proper resolutions, no QE/CI