I personally love MOO! Their business cards are of excellent quality, well worth their price! Especially since every image on the cards is customizable-you can have all of the items from your shops on the back of your cards! It's totally cool! :) When ever I tell people that I sell things online and they ask me what kinds of things, it's so neat to be able to pull out some business cards and not only look professional, but also have a mini art gallery in my purse!
http://us.moo.com/As for how to list your shop...I would just put a direct link to it. In your case, that would be...
http://www.etsy.com/shop/LooseCapI have an email address just for etsy and all things relating to my business that I also include on it. If your comfortable with it, you can even include your phone number.