Inspired by Virgin Shuttle Simulator and Space Shuttle Mission 2007, me and my mate have started the work on our Shuttle Simulator
No screens for now, its very-very alpha and very early Design Doc is indev and it will be available soon.
So, our key is simulate the shuttle and its procedures (preflight, ascent, launch, orbit, de-orbit, landing).
Feel free to ask and join the conversation about it, if want to help us with information or with development, you can PM me.
More info soon, cheers