From the MSFT website:
"Microsoft is shocked and saddened by the horrible tragedies that occurred on September 11th. Our hearts go out to everyone involved in and affected by these attacks. We are focused on doing the right thing out of respect for the victims, our customers, partners and employees. With this in mind, we have decided to postpone releasing Flight Simulator 2002 for distribution. We will announce a new date when it is determined."
http://www.microsoft.com/games/fs2002/