Launched in 2010, Pinterest worked its ways up the ranks of social networks to become the fastest-growing site in history, passing 10 million users in nine short months. The image-based network, as I'm sure you have seen, allows you to create boards based on categories and upload and share images, creating a scrapbook-like album or collection of images.
The website now hosts 20 million users, and that number is about to sky rocket. Announced this week, Pinterest will be ditching its invite-only policy and opening the doors of creativity up to everyone.