They could be very cool. I like the idea.
I don't want to sound like a jerk, but you have a number of spelling mistakes in these.. no biggie if it's just for fun, but if you really want to make them special, spend some time checking the text before putting it on, and maybe space it slightly better too :)
Please don't be mad at me! :)
PS - the first links don't work anymore since it looks like you moved them to a /cards subdirectory :-P