Great use of the white boarder on this card.  The contrast of matted and semi gloss really gets the branding across on the front.  His layout on the back is a great way to divide up information that is important.  My only caution is when printing white boarders be careful.  The cheap printers are not an option with this design.  Getting equal sized edges will be difficult unless the printer is good.  Pay the little extra on designs like this one. 

Here is the business card designers site http://www.aaronrudd.co.uk/