I was out shooting a triathlon this morning with my D70 and 70-200VR. I was using the AF-C and Dynamic Focus modes and was disappointed how many OOF shots I got of runners moving towards me. The camera had not locked focus in many of the shots, judging by the absence of a focus point shown by Nikon Capture. Shutter speed was typically around 1/500 or 1/640 sec, with an aperture of f/3.5, and I was shooting in bursts of 3-5 JPEG Fine. I have a question for any action photographers who have had an opportunity to shoot with both the D70 and D2X. Is the AF speed and accuracy significantly better with the D2X? For an additional $4K I should hope so, but I'm willing to admit that at least part of the problem is the photographer . . .