Oh, Facebook has a deal to announce? Really? Don't rely on rumors. For confirmation of Facebook's as-yet unannounced deal with Microsoft, look no further than ... Facebook. Brandee Barker, the charmingly indiscreet head of Facebook PR, has just added Adam Sohn, who heads up global sales and marketing PR at Microsoft, as a friend. Just buddies? I think not. But I'm sure writing up the press release announcing Microsoft's investment and ad deal will make them fast friends, indeed.