The Washington Post published an amusing piece about a group of pranksters pushing a product to the top of Amazon sales, It's Made of 100% Cotton; Its Sales Are 99% Ironic.
For a day or two, a black T-shirt featuring an image of three wolves baying at a full moon claimed the top slot at the online store's clothing bestseller list beating out the usual, unremarkable mix of Levi's 505 regular-fit jeans, Crocs clogs and Adidas running shoes.
If these guys can do it as a prank, serious Internet marketers can do this for a purpose...