You can get 10 free business cards from Moo.com. You can even personalise them, making each one different. There's even the option to link it to your facebook or flikr account, and it grabs the piccies from there to upload onto your new business cards.
Delivery seems to be free as well. I'm about to order mine now!
When you order the MOO Business Card Sampler, you'll be going through the same process as a normal order, but you'll be sampling just 10 cards. It's quick and easy, and the cards are the same professional quality as a regular Business Card order.