A solid third-party app ecosystem is going to be absolutely critical to Windows Phone 7's commercial success -- and Microsoft clearly knows that, having spent nearly as much (if not more) energy talking to developers since the platform's announcement than it has directly to potential end users. In particular, one area where Microsoft really wants to play ball (pardon the pun) is with a rock-sold gaming experience -- and to that end, it seems Redmond isn't being shy about putting its money where its mouth is. The rumor going around today is that Microsoft is reaching out to developers of popular iPhone games, offering cash in exchange for a Windows Phone 7 port; you might think that m