Whats the difference between XNA Game Studio Express and XNA Game Studio Professional?
XNA Game Studio Express and XNA Game Studio Pro are related products targeting non-professional game developers and established professionals respectively. Both products integrate with Microsoft Visual Studio. XNA Game Studio Express is intended for the hobbyist/small development group and therefore designed to help create non-commercial games. XNA Game Studio Professional will include additional functionality needed by professional game developers wishing to create commercial, signed titles.