The setup for the Linksys/Cisco WVC80N is the same as for the WVC54GCA with one small exception. The "Path" should be "/img/snapshot.cgi?size=3&quality=3" If you leave off size and quality it won't work. It took me a while to figure this out so maybe it saves others some time. I would have added a wiki page for it but I am just learning to use the wiki.
Note: The WVC80N is basically the market replacement for the WVC54GCA so this should be useful info.