I’ve become quite the fan of Greasemonkey scripts to add functionality to the sites I frequent, but I grow weary of having to keep the scripts up-to-date on each computer I frequent–four in all (two desktops at home, one desktop at work, and my laptop).

It would be great if someone would produce a proxy server I could set up that would inject the code into each page as it was served via the proxy. A server-side Greasemonkey, if you will.