Does Pinterest Infringe on Copyrights?

The new Pinterest internet craze is raising concerns about copyright infringement. One of the most important related precedents was set when Google was taken to court for copyright infringement over thumbnail images that didn't properly attribute rights holders. The courts ruled in Google's favor, and a new precedent was set in 2007. Both Pinterest and its detractors cite the case in their support. Pinterest defenders claim what it does closely parallels Google, and is therefore protected by the same fair use laws. Detractors argue that because Pinterest is circulating content much larger than a thumbnail and using full-resolution images, the laws that shielded Google don't apply.  WSMV has this story.