A blogger-gal I know who always seems to have her crafty fingers on the pulse of what's new and hip introduced me to MOO a few years ago. I have ordered all of my business cards and jewelry tags from them ever since. If you don't MOO, you should. Awesome quality and top-notch customer service. Check out their website.
Here are the new cards I just ordered because we're switching internet providers and I'm losing my sbc email address. Boo. Still, it's an excuse to get some cute new cards.