Another way to make your card stand out is by varying it's width. The perfect example would be So Takahashi of Heads Inc. thick plastic business card.
So Takahashi's Thick Business Card
Similar Designs:
Corporation Pop's Thick Business Card
Aaron Kanter's Plastic Business Card
Matt Saunder's Cute Business Card
Business Card Layout Tips 
Nesting LLC's Letter Pressed Business Card
Steve Smith's Cut-out Business Card
&Yustin Minimalist Business Card
Reparto Creativo's High Quality Business Card
Identity Kitchen's Advertising Business Card