During his keynote today, Facebook CEO Mark Zuckerberg announced a new Facebook app from Microsoft called Docs, which lets Microsoft Office documents be shared with Facebook friends. The app was created by Microsoft's Fuse Labs. "It's been quite a sprint for the FUSE team to deliver this beta from concept to its initial implementation in less than four months," says says Fuse in its announcement. "The FUSE Labs mission is to explore a range of 'Future Social Experiences'.