$50M just a rumor?
http://www.1up.com/do/newsStory?cId=3160380
The guys from Take Two said it themselves: "The first $25M will be for the first episode, and the other $25M for the second episode"
And once again....M$ waists money because it ends up on the PS3 again
*on a side note, the very first comment you see is "...All you 360 fans, just wait till '08. When the PS3 gets Killzone2 (which may come out this year) MGS4, Little Big Planet, Home and all the other good exclusive games and services"