Microsoft already provides its own Facebook + Office Web Apps mash-up, known as Microsoft Docs. Via Docs, Office Web Apps users can share their documents via Facebook with their friends. But my source says Facebook’s announcement on Monday will take things a step further by directly integrating Office Web Apps access into the new Facebook e-mail — much like Microsoft does now with Hotmail.Gosh, this is starting to sound a lot like Google Apps, isn’t it? Only, of course, with that missing social piece with which Google has been struggling for years now. You can still turn on Wave and Buzz, for example, within Google Apps for your users, but would you really want to? It may seem farfetched to call this an enterprise play. We don’t even know for sure if Facebook is unveiling an email service. Let’s give ourselves the luxury of speculation for a moment, though, shall we? Microsoft has already shown that it can integrate its email services into large communications structures as it did with its Live@Edu product for an ePals partnership. It frequently supplies its email and Web Apps services to third parties for branded email services. What if Windows Live services become the back end for a Facebook email? Go to article.