Awesome new stuff on Facebook. Check out the Channel 9 interview Charles did with Lily Cheng below. You can get more information at http://docs.com. (Should be easy enough to remember that URL.)
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!