Who's gonna get caught with their hand in the cookie jar?
I can think of a couple of apps that will probably make it over to WP7 Mango. The Xbox 360 hints to it a little. Crackle, Hulu, Comcast's HBO and/or Max mobile apps and a few others seen on the 360. It will be interesting to see the actual list and which developers will have a change of heart about WP7 after the first half of the year.
WP7 is growing, And rapidly at that. I think many devs are realizing they could make some money in that marketplace. With Nokia backing Windows Phone I think you'll see more developers including Windows Phone when they make their apps.