First, I must again say that the new color aerials are an absolutely fabulous additon to TF. They provide more recent, more detailed and just generally much better views than those from Terraserver. But you knew that.
OK, Let's add a "hot key" or other method of setting the zoom of the the current tileset at 1:1 resolution, that is, 1 tile pixel per monitor pixel. That way the resolution can be maxmized for any given view.
And while the "Zoom Box" has a negative function (right click) lets add the feature that the right click causes the "current view" to zoom out AND center on the clicked point. This is pretty standard functionality on many mapping packages.
For riding/training (and cheapskates).
Add in a formula for "power" based on GPS climbing data alone.
While riding I have found that the Garmin "vertical speed" indicator is actually a pretty good measure of performance (as also recognized by a Dr. Ferrrari), if not accurate to the tenth decimal place. For any given track segment, if speed and grade are known (which they presumanbly are via TF calculations) , then a rough calculation of power requires only the additional input of weight (total of bike, rider and "stuff"). This wouldn't replace, nor be as accurate as, a true power meter but would be a reasonable use of the available data for those who ride mostly hilly terrain and use only a GPS receiver and TF. Obviously this would be relatively meaningless for flat terrain.
Again, I expect this should all be very simple stuff.