John Contarino of Hypnodesign's business card has this hypnotic red swirl spiraling into the card which is also it's company logo.
John Contarino's Swirly Business Card
Similar Designs:
John Henry Donovan's Letterpressed Business Card 
John Lauren's Minimalist Business Card
John Bragg Photography's Business Card
John Waire Photography's Typographic Business Card
Red Square Agency Business Cards
John Campbell's Artistic Business Card
Airhouse's Simple Red Business Card
Ancillary Magnet's Business Card
Sukcess' Cool Business Card