Word has been circulating for weeks now that Twitter was soon to be swooping up the popular third-party app, TweetDeck. In early May, Mike Arrington reported that the deal was as good as done, but the two companies were not yet willing to publicly release the numbers. Today, CNN and CNET broke the news that TweetDeck has been acquired by Twitter for $40 million. Twitter has yet to officially confirm, but judging by what we're hearing from sources close to the deal, it's done and done..