Amazon has just introduced Amazon Collections, and it appears to go up directly against Pinterest. Indeed, the look and feel of the site is eerily similar to that of the pinning service. Just like Pinterest, Collections lets you gather images of your favorite Amazon products and display them in different lists -- sort of like a visual version of a wish list, if you will. Users start out with default topics like "My Style," "Want List" and "Possibilities," which they can modify and add on to if they wish. Also like Pinterest, users can find and follow those with similar interests, and they can "heart" or add listed items to their own Collections. With Pinterest moving in on the e-commerce space as well, it looks like the digital pinboard space just got a whole lot more competitive.