Barnes & Noble and Microsoft's mutual appreciation is getting a lot more real. The duo issued a joint announcement today, marking the completion of Nook Media LLC, a "strategic partnership" made up of the bookseller's digital and college wings. The news comes after a $300 million investment in the pairing. Further plans for Nook Media are vague at the moment, as the companies note, "There can be no assurance that the review will result in a strategic separation or the creation of a stand-alone public company." Until such key things are decided, B&N for one doesn't plan on elaborating. You can find a bit more, however, in the press release after the break.