An expansion pack for Flight Simulator X has been announced. Dubbed Adrenaline, the add-on is set for release this Fall and will build on the original by including support for Windows Vista, DirectX 10; new features, including multiplayer air racing, new missions, and an all-new aircraft, including the legendary P-51 Mustang.

They also revealed that Service Pack 1 and a DirectX 10 update is in the works for the original game. SP1 is tentatively scheduled for release this April and will include performance improvements, among other things; the DX10 visual update will be available as a free download around the launch of Adrenaline.