I found that my old (?) Creative Webcam (model: VF0400, product id: 0x4061) works with the ov51x-jpeg driver on my Acer Travelmate.
To install the driver go to a terminal and write:
sudo apt-get install ov51x-jpeg*
It seams that video is working in Empathy and Skype. Also the microphone works in Skype (when chosen as input device).