There's a great gallery up at BestDesignOptions of 40 inspiring ideas for business cards - based on real people's real business cards. Makes my little cardboard company-issue seem a bit bland by comparison. Reckon I'm going to have to jazz mine up a bit.
The ideas, as you'll see from this small sample, range from the sublime
to the fine
to the man-I-wish-I'd-thought-of-that.