I don't know what I was expecting when I entered this into Google, but not this:
This particular set is by Ian Roth Designs. According to his site, human hands represent the value of each suit card using different digit combinations.
Another fabulous modern set of playing cards is from The Playing Card Project, by 55 different Minnesota artists.
Click here to see all the cards.
More links to wonderful decks of cards can be seen on The World of Playing Cards and Card Art.
The most expensive deck of cards currently produced is probably the stainless steel zebra-backed cards I wrote about a ways back (you can get Sudoku toilet paper on the same site).
And the highest price ever paid for a deck of cards was $143,352.00 by the Metropolitan Museum of Art for the earliest known complete set of hand-painted cards.
Update: And right on schedule, Snopes publishes a series of urban legends related to playing cards.