Nerval's Lobster writes: Microsoft’s big reorganization has begun. Rumors had persisted for weeks that Microsoft CEO Steve Ballmer was planning a massive, once-in-a-lifetime reorganization of the company he’s been running for quite some time. Now the plan is out in the open, and things are going to change in huge ways. Microsoft will coalesce around “a single strategy as one company,” CEO Steve Ballmer wrote in a really lengthy memo posted on Microsoft's Website, “not a collection of division strategies.” The company’s product portfolio—from Windows and Xbox to enterprise applications—will be regarded and operated upon in a holistic manner. Ballmer wants this “one company” approach to extend how Microsoft handles its advertising, marketing and consumer-service operations. Ballmer also wants to knock down the walls that have slowly grown between Microsoft’s various divisions, at least as far as engineering’s concerned. The new “engineering culture” will apparently facilitate collaboration “across the company,” with an emphasis on cross-group contributions (and maintaining secrecy, of course, for the giant projects). Read on for much more on how Microsoft is reorganizing all its internal groups, as well as a rundown of who's in and who's out on the executive level. What does all this internal drama mean for you, if anything?