Microsoft and Apple have been working together for a looooong time. They first started working together when Apple asked MS to write a version of Basic for the Apple II computer way back in 1977, called Applesoft and they've been working together since then.
A really good interview with Steve Jobs and Bill Gates together from 2007 is here (about 80min long, but very interesting!):

starcraft: "I and every PS3 fanboy alive are waiting for Versus more than FFXIII.
Me since the games were revealed, the fanboys since E3." 


Skeeuk: "playstation 3 is the ultimate in gaming acceleration" 









