What’s that, Wall Street? You say you’d like to see more revenue streams out of Facebook? Here’s another one — or at least a potential one: Facebook is adding a feature that will make it easier for brands to push photos of their products to Facebook users, who can then collect the images in a Pinterest-style folder, or simply head to a retailer and buy it online. Facebook isn’t charging anyone to use its tool set — yet. But you can see obvious ways that Sheryl Sandberg and company could use this stuff to make more money. Read the full story at All Things D.