Push Pop Press, a start-up digital publisher, announced recently it's been acquired by Facebook. Push Pop, founded by former Apple engineers Mike Matas and Kimon Tsinteris, originally aimed to approach e-books by incorporating new designs, better imaging technology and interactive elements. It's first and only publication was Our Choice, an e-book in partnership with Al Gore focused on climate change. Instead of going forward in the e-publishing realm, though, the team will be packing up and moving to Facebook.