Hmm I've been using the following: https://gist.github.com/932137 for some time now - it's just a bash function which lets me type:

$ show 3000 test

and get http://test.tekacs.com/ -> port 3000 on my computer using just SSH, assuming you have root access to the server (which you would need to set up forwarding on port 80 anyway...)

$ ssh -tR 1080:127.0.0.1:$1 vps "sudo ssh -Nl \$USER -L $REMOTE:80:127.0.0.1:1080 localhost"

being the functional line...