http://www.joystiq.com/2009/10/14/fo...rm-new-studio/

(I would have tacked this onto the thread about MS dissolving the group, but can't find the original thread. Anyone?)

It looks like the ACES studio has reformed as Cascade Game Foundary. A reply to the article asks why these guys don't contribute commercial plugins to the X-Plane group, who have a free open source FAA-approved simulator package.

http://www.x-plane.com/