Open Source Flight Sims

Rorschach_6 writes: "Not one but two Open Source initiatives to create a modern combat flight sim have come to light in recent days. Both stem from the overreaching Falcon 4 flight sim. Check out eBattleField or OpenSimulation." The problem that I always had with flight simulators is that I found the ground just uncontrolably alluring. Thank god they don't let people like me fly non-virtual planes ;)