There is an opensource project called OpenVPN ALS (used to be called Adito). It is a web-based SSL VPN solution! It is wonderful! I just tride it out today. It is linux based, however they have a windows port as well.
What is the likelyhood of something like this getting made a part of Monowall? Monowall is the best firewall out there, can you emagine how more popular Monowall would become if it had a Web based SSL VPN solution in it as well!? It would rival all other firewall/vpn solutions out there.
Anyway, here are a couple links to the OpenVPN ALS project:
[Project Page]
http://sourceforge.net/projects/openvpn-als/files/[Windows Port (for those that want to try it fast on a desktop)]
http://lars.werner.no/?page_id=153
m0n0wall Forum > m0n0wall Support (English) > Feature Requests
Topic: OpenVPM ALS (Adito) Web-Based SSL VPN