Like many other printing companies who sell products online, NextDayFlyers.com has a lot of easily adaptable templates, so creating a business card for any industry or to match any particular style or aesthetic should be a breeze.
There are standard cards, cards with rounded corners, and folded cards (which give you twice the amount of space to share a message with potential customers). I know I've picked up--and saved--business cards in the past simply because I was attracted by a cool design.
What distinguishes NextDayFlyers is the company's committment to green practices. For example, their cardstock uses 50% post-consumer waste.
Oh, and NextDayFlyers promises "offset quality for a digital price," which is pretty cool, too.