My wife just recently started a food blog and along with that found Pinterest. With a site redesign we did, we added a Pinterest button directly next to the Facebook like button. The Pinterest button gets upwards of 10 times the actions as the facebook like.

We were just talking about how it is not considered as acceptable to share as much mundane stuff on Facebook and how that is what Pinterest is all about. Facebook has no way to easily categorize or review what you have shared in the past, so it gets lost. Women especially seem to enjoy this.

One odd thing is Pinterest doesn't seem to combine all pins of a single image together. For a single image, you may have 20 different pins, each of those with their own set of repins and comments. See: http://pinterest.com/source/thinlyslicedcucumber.com/