I designed my own using
http://www.moo.com. They've got a quick tool for making simple font/color/text choices, which were enough to meet my simple needs.
The best part though, is that they'll print however many designs you want, evenly distributed across however many cards you order, at no additional cost. This has led to me a/b testing my card designs:)
I order cards 50 at a time, and order 3 or 4 variations. Then, when people ask for my card, I tell them that I'm a/b testing my cards, pull out a couple, and let them choose the design they like the most. It's a great conversation point, a good way to talk about my love for user testing, and I'm gradually honing in on a design people seem to like (I'm on my third batch).
P.s. If you're a hacker (or someone else) that hasn't haven't ordered personal business cards, you should. I can't believe how many I ended up giving out, and how much easier it makes making business connections when I meet people. Well worth the 30 minutes and $27. I wish I'd done it a year sooner.