General Software ProblemsQuality not quite what you expected? Need help with video capture, editing, encoding or playback. Post here for software not covered elsewhere.
Webcam software would seem to be your best bet. Something like http://www.orangeware.com/endusers/webcamdv.html should do the trick. Note however that this is essentially turning your PC into a server with all the necessary caveats that go with it.
If you have a video capture card that supports phono or s-video you can use windopws media encoder. Set it up to choose the video card as the video source.