Ooh. Whilst decorating my room, i was considering re-vamping an ugly bookshelf. However, i did not.I was going to glue playing cards to the surface then varnish over them!
Anyhoo, thot that would look rather dashing. You should try it, I'd like to see how the end result looks.
Ooh! You could market it as a Game Table! You can hit the internet to find pictures of popular board games and their pieces, and decoupage the top with cards and those pics (I don't know how well Modge Podge does with inkjet stuff, but it's a thought) and then show hoe a couple board game boxes would fit underneath in the 'store your books here' part. I would totally buy one of these if I saw it... of course, now, I have to hunt around for a desk like that so I can do it!
You could probably also charge a few bucks more for it, since it would be more of a specialty item, and it probably wouldn't take too long to do... and who knows, maybe you'll end up keeping it.