I wish one of the computer experts on the list would come up with a way
to replay IGC files in 3D on Google Earth similar to the 3d replay in
SeeYou or allow my to sit in a virtual cockpit and look around while
following the trace, and also build a flight simulation interface so I
can fly a plane or glider through it with three axis control. So far
for flight planning Google Earth is the best I have found for really
looking at terrain and evaluating the potential of ridge flights.

Good old MS Flight Sim is useful but not as good as Google Earth.

Tim