I do the print-your-own version. I happen to have one with a sort of rainbow/artpaint border. Occasionally it comes across as loud, but most of the time people love them. I always carry a few in my wallet (though I'm out of town right now and have run out!! Luckily, I'll be home Tuesday).
I have full name, Stage Manager, address, phone, and email. I find it's easy to just have everything on it, and this way can give to friends, too. (Since I've moved so much and no one seems to remember which is most recent.) And as someone else said, just about anybody can find you these days.
I got tempted to put a quote on the bottom at one point, or something like the AEA logo (which I don't think you can even use legally), but that completely looked too unprofessional. My cheery border makes me happy, and usually gains a compliment.
Erin