Here is a very interesting concept, the M++CARD is a Business card which includes memory storage on the rear side of the card.
The back of the card is laminated so as to hold a memory card (like Sony M2 Card). Two slits on the card make it possible to snap on a USB adapter, through which this card can be accessed.
As per your needs, related data can be stored on this card. Thus, M++CARD can become truly business card, company info card, website card, product info card, portfolio card and so on.
Photo by Abhinav Dapke.