If you get through this page and you're jonesing for more tech-oriented covers, Iliad had a ton of these over the run of the User Friendly comic strip. <a href="http://www.userfriendly.org/archivist/gallery/songs.html" rel="nofollow">http://www.userfriendly.org/archivist/gallery/songs.html</a> No audio though, you'll have to sing them yourself :)