wanproxy woudl be VERY useful if it were in zeroshell.
It would basically allow a VPN Server to Cache requests.
http://wanproxy.org/examples.shtml
Also Wanproxy can be run as a singel server, and other VPN servers on the network can use it for doing the proxy checking, which is even better when you have many VPN servers, and want to store all the proxied data in one place.
Any one else think this is a great idea ?