It returns something like:
CODE
http://www.xiregames.zxq.net/email.php?e=cm9vdEBsb2NhbGhvc3Q=
Clicking that link will forward you to mailto:root@localhost
The spammers dont see your email and your users can still email you.
See it live here
Get the script here
Not the prettiest looking links, but I doubt anyone shall notice. It gets the job done and deters spammers.