Forget what Rovio was saying yesterday, Rovio CEO Mikael Hed has done a complete 180 and said that the company is working on porting it to the Microsoft platform. According to him, it is a "big undertaking to support" and that "you have to completely rewrite the application." A new power-up, called Space Eagles, is awarded for progressing throughout the game or can be bought via an in-app purchase.
The game has topping sales charts since it was released yesterday. Currently, the first 60 levels are playable, with more coming through updates. Hed said "We are working towards getting Angry Birds Space to WP7," which indeed confirms that it will be released for almost every mobile segment now available. No release date has been set for sure.