According to Pocket Gamer, a source told them that Microsoft are contacting developers of successful apps launched for the iPhone.
And they are apparently willing to pay large sums to get those successful apps ported to the Windows Phone 7 platform in time for launch.
It would indeed be great if the Windows Phone Marketplace was stocked up with apps at launch date (some time this fall?). But according to the same very source, the money Microsoft is willing to pay just isn’t enough for the work to port the code from iOS to the WP7 platform.
Microsoft paving the way for Windows Phone 7