I do like the compact form factor of the mini business cards, but sometimes, you might need more room to be able to include more information. In this case, you can do what photography studio & gallery, the Painted Light did with their business card and make it into a booklet of sorts. Designed by Funnel.
The Painted Light's Business Card Booklet

Similar Designs:
Unique Peel-away Business Cards by Shinebox Print
Porch Light's Letterpressed Business Card
Light Bulb Creative Business Card
BookletCards4u Folding Business Cards
Does the Business Card Size Matter?
Super-Junk's Cute Photography Business Card
Abigail Mayfield's Natural Letterpress Custom Tags
Ed McCulloch Photography's Unique Business Card
Funnel TV's Cool Business Cards