Moo have mini cards, stickers, business cards, greeting cards and post cards.
I use my mini cards as business cards. When you buy my photos on the web I send a card with the package with the picture on it that you have bought. At the store Nära o Kära where I sell my photos you also get one with your purchase. Here are some links with ideas of what you can use your Moo cards for: Flickr, Moo ideas