I have seen the HD Life Cam do really well on Saturn and the moon. Brings out some wonderful details of the moon and if seeing conditions permit Saturn also. They don't cost a lot and are almost ready made for the 1 1/4 focuser hole. So it doesn't take a lot to get one going to observe with.
Here is an example link to one.
http://www.amazon.com/Microsoft-Life...uct/B002MCZJ78
Hope this helps some future person who may want to observe with a webcam.
Jim NC