One thing I love about the series design is how easy it is for people to play around with. Last year, Tom Scharpling came up with this one on Kriss Kross (got the cropping wrong, though). And last year Hayden Childs, author of the 33 1/3 on Richard and Linda Thomson's Shoot Out The Lights came up with a series of great covers over on the Powell's blog. Now Jim A. has come up with some great covers for the best of the worst possible 33 1/3s. Click here for the full set (via NY Magazine's Vulture). I also really like the Prince idea.
How about this? Make your own hypothetical 33 1/3 cover, put a link to the image in the comments of this post, we'll pick a winner* some time after the July 4th holiday, and the winner will get some recent 33 1/3s, some doo-dads we have around the office, and maybe a copy of A Cultural Dictionary of Punk which is just off the press, and has already gotten plenty of compliments in the cover design department.
*Just so there is no confusion, this is a contest to make an amusing 33 1/3 book cover that will (most likely) never become a book, not an open call for proposals for new books in the series.