When Facebook launched its hardware-focused Building 8, it raised all kinds of questions: just what was it making in there, and when would you see the first fruits of its labor? You might not have to wait long to get the details. Sources speaking to Business Insider claim to have a broad overview of not only what Building 8 is creating, but when you might get to see it. The team is reportedly working on four advanced technology projects, and is poised to play a key role in Facebook's F8 conference in April. In other words, some of its secretive work would be revealed in a matter of weeks.