Perhaps you could think of some random dirty tricks, and bury them in perlmonks.org. Any kind of small non-security threatening little trick ( ala Assume God-Like Powers node ) and the first to find it gets a prize. Something like a t-shirt. Actually that could get a little expensive on you, so maybe just a couple of XP. Just a thought. Make people look at the site more and sift through some code, some HTML, etc, etc. Half a learning experience, half scavenger hunt.
Everyone has their demons....