This business card:
A card for a developer, with a behind the scenes peek at all the code? Excellent idea! (My husband is a developer--I wish I came up with something like this for him!)
Check out webdesignerdepot for 99 more really cool cards--some you've seen, others you haven't... either way, a lot of these cards are great!
(thanks to Andrew Kelsall, via Twitter for the link)