VNC FAQ-o-Matic : SSH and Other Step-by-Step How-To's : How to setup an encrypted tunnel (eg, SSH) for my VNC connection :
Using PuTTY's SSH on Windows
From John Aldrich: I'd like to propose that you either host or link to http://www.benjamin.weiss.name/putty-tunnel.html This is an EXCELLENT tutorial on how to configure PuTTY for SSH tunneling VNC. I just couldn't understand how to tunnel SSH until I saw this.... (thanks to John for the contribution!)
Using SSH or OpenSSH