We originally had some cute MOO mini-cards made as our boat cards.
Then we decided to ditch the paid website and go free blog only and so I have to remember to write in ".blogspot" on cards as I'm giving them out. Obviously not a big deal but it ruins some of the fun for me.
I had some MOO normal sized boat cards printed out and they are gorgeous. They will send you a sample pack of 10 free cards - I highly recommend you take advantage of that. The quality is great. However, they are 50 cents each which is silly and combined with the fact that I have a pack of mini-cards that are serviceable if annoying, means I haven't splurged.