It would also be nice to have a realtime coordinate system (like a ruler anchored to the editors grid) similar to Id Software's QuakeED or QeRadiant (now called GtkRadiant) 3D editor as well as have size in units-of-measure of the Polygonal/Primitive displayed with square dimension symbols or lines. The realtime coordinate system would help when using the 3d viewing windows so if you move to far and loose your place you can use the coordinates to find your way back to the model.
GtkRadiant Tutorial Firstroom part 1 - 1min 20sec you should to what I mean by a realtime coordinate system
http://www.youtube.com/watch?v=Xx07GYyGAHc
GTK Radiant First Room - 5sec you should see the Polygonal/Primitive displayed with square dimension symbols or lines and numbers - I know the view is blurry but it's the only one I could find at the time:
http://www.youtube.com/watch?v=BJI71pYvKDg
