The new nightly/beta/test version of PuTTY supports port fowarding. Pretty cool! You can setup a local port on your box to forward to a port on the remote box. So you would connect to your local box and PuTTY forwards the request down the encrypted channel to the port on the remote box.

I setup port 80 on my local box to forward to port 80 on the remote box and then went to http://localhost:80 and checked the logs. In the logs it looks like the remote end makes a request from itself. Pretty cool!