1 Pinterest: New social photo sharing website

Pinterest is a pinboard-style social photo sharing website that allows users to create and manage theme-based image collections such as events, interests, hobbies, and more. Users can browse other pinboards for inspiration, 're-pin' images to their own collections and/or 'like' photos. 
Website: http://pinterest.com/       
Pinterest's mission is to "connect everyone in the world through the 'things' they find interesting" via a global platform of inspiration and idea sharing. Pinterest allows its users to share 'pins' on both Twitter and Facebook, which allows users to share and interact with a broad community. Founded by Ben Silbermann, of West Des Moines, Iowa, the site is managed by Cold Brew Labs and funded by a small group of entrepreneurs and inventors. It is one of the “fastest growing social services in the world

Pinterest is similar to earlier social, image bookmarking systems based on the same principle, such as David Galbraith's 2005 project Wists. It allows users to save images and categorize them on different boards. You can follow other users boards if you have similar tastes. Popular categories are travel, cars, film, humor, home design, sports, fashion, and art.

Development of Pinterest began in December 2009, and the site launched as a closed beta in March 2010. The site proceeded to operate in invitation-only open beta.

Nine months after launch the website had 10,000 users. Silbermann and a few programmers operated the site out of a small apartment until the summer of 2011

In January 2012 comScore reported the site had 11.7 million unique users, making it the fastest site in history to break through the 10 million unique visitor mark. Pinterest's wide reach helped it achieve an average of 11 million visits each week in December 2011. Most of the site's users are female.