A proxy script modification or add-on will enable your proxy to do something it could not do before, or restrict something that you don't want it to do.

These suggestions have been recieved:

php mod or cgi mod for orkut
mod to track the IP of mailers
get youtube videos to work
get myspace logon/bulletins etc to work
filter unblocker

We'd like to hear what mods people would like to see for their proxies. Some already exist, but our aim will be to make these add-ons free for our users.