Ok, I've put the script on a server which doesn't mind downloading the file to display. And for the hell of it, I got a domain as well
Check out: http://showsrc.com/
I've also made it dead easy now to link to ones sources. Lets say you want to provide someone the HTML version of the souce code which resides here: http://jtank.net/src/src/net/jtank/io/Ini.java
Simply prepend "http://showsrc.com/
$" to it (so that you get http://showsrc.com/
$http://jtank.net/src/src/net/jtank/io/Ini.java) and bob's your uncle
Could it be any easier? Of course this isn't a replacement for those who are showing a lot of source and will install a local version of the script, but for people with only a few sources to display it saves the hassle of uploading and configuring the script.