With all this spare time going free after finishing my Critters entry i thought Id dabble in Zbrushes Movie pallette and came up with this short tutorial on the Transform pallette and in particular the well hidden "modifiers" option which allows constraining movement, rotation etc on one axis only. Also restrains brush movement too, so good with the move brush....
As theres already a post regarding XYZ i thought this might be helpful too.
This is also useful for zsphere models too, but you have to be in preview to access the XYZ mods and then press "A" again to go back to the spheres....
JC
EDIT: If anyone knows how to upload a youtube video so that you get the full screen button, please let me know.