Oh my god, have you guys discovered Moo cards yet?? Mine just arrived today and I'm very, very happy with them. The good ol' Andrew over at bundle made me aware of them and I ordered my cards in a flurry without a second thought.
This is how it works:
1) Choose up to 100 different photos from your flickr photostream
2) Choose the crop area for each image (moo cards are a panoramic shape)
3) Come up with some text for the back (I chose business card text but you could put anything, or nothing)
4) Pay $25 US dollars to have 100 little cards delivered to your door, anywhere in the world.
I always wanted business cards with patterns on the back, and was going to Gocco print them... but damn this was so much easier!