Oh, and to comment on the original question: putting VNC java on a webpage wouldn't be too hard, IMO. Juts make a link to the server port, viz:
http://123.456.789.000:5800 and it should open the VNC java viewer in a new browser window. If you wanted to choose the server, make an input biox pass the IP onto the URL. Should work fine that way.
Only VNC is not too secure. Only the initial password, not the data you view, is encrytped. It's a bit bare unless you use a VPN tunnel or something.
Cheers
Mick