Om called it. One of the beneficiaries of Microsoft buying Skype could be Facebook. Presumably, Facebook’s search and advertising partnership with Microsoft presents a easier path to continuing collaboration with Skype than if Skype had ended up at Google – although it’s not clear that was really an option. Last fall, Om wrote that Facebook should buy Skype to unify old and new style social communications, and build out a social directory. From a social media perspective, Skype is a serious contender for the role of unified communications hub, and has users and technologies that could contribute to presence management and identity authentication/management. All are key areas of competition and/or partnering potential for Microsoft, Facebook, and Google. Should be fun to watch.