And try the Yahoo/etc software but beware that most cameras are not built to run as a webcam. The designs are for size and wieght so the cameras tend to overheat and expire. If they don't tout the webcam feature, then you know why.
I have a Sony DSC-W5, and I love it. However, I don't want to spend extra on a webcam, when I have an awesome camera. Is is possible to use it as a webcam, and if so, how?