After playing with lab view and the ArduPilot with the ArduIMU I have finally managed to get the time lag from the plane to the displayed action on the GroundStation to less than a half a second.
New VI file 1 AM 3/17/2010
Here is my rather crude video.
Here is the new VI for labview
The file name GS = Ground Station mph = Miles per hour FT = feetGSmphFT.vi
Here is my latest version.GSmphFT2.vi