Microsoft FUSE Labs has created (and released to the web today) a new social experiment that aims to add some "friendliness" to your documents: Docs - a way for you to discover, create and share Microsoft Office documents with your Facebook friends. Built using Microsoft Office 2010 – Docs for Facebook provides the best possible document service for the Facebook environment. Seamless integration with Facebook means that the service is all about sharing your documents. Finally docs can be friendly too!
From Lili Cheng's blog post: The fact that we’ve been able to adapt the Office 2010 “Web Apps” technology to work directly with Facebook truly speaks to the flexibility and power not just of the Facebook platform, but also of the Office system’s rich “contextual collaboration” capabilities. And we’d never have been able to achieve our critical ‘simplicity’ goals had it not been for our ability to use a new test feature from Facebook that allows us to build an instantly personalized and seamless document authorization & sharing experience directly from our site.