Somehow when I edited a phrase in this post late Thursday night, it messed up my scheduling. Sorry it's late, but I hope you'll enjoy anyway.
World of Filkcraft is something I stumbled into, and I have to say that their parodies are phenomenal. If you don't know World of Warcraft, you may not understand some of the references, but I think you may enjoy these anyway. Aergor and Aquilae are fabulous singers; their two co-conspirators, Maeril and Aeslin, are wicked lyric writers. Here are two of my favorites.
A Gnome is about a young lady who had been playing on the Horde side with an online buddy. After she'd not seen him around for awhile, she ran into a gnome who waved at her. Her buddy had switched factions to make an Alliance character. A gnome. (I love my gnome rogue, but I think her dismay is hilarious.)
I've Been Everywhere is an Orc's travelogue. The game keeps track of everywhere you've explored, and after you've passed through everywhere, you get a special achievement. The song cleverly fits in so many places with a perfect video capture at the end. Follow this link if you want to go to the video itself. The guy doing the song has a little bit in the comments about how he put it together. Pretty neat.