I have used PS7 for quite a while and am currently switching to CS4.
There is a VERY!!! useful shortcut that I use (on a PC) to move individual layers such as: bushes, flowers, rocks, tree etc, in PS7 without having to: right-click over them, scroll down the list, then select and then move. In PS7, with the move tool selected, I just have to hold down the ctrl key and left-click and hold on whatever it is I want to move, and move it. PS guesses as to what layer I want to move by the pixel that is directly below the tip of the move tools arrow cursor. So far I don't see the CS4 version of this. I really hope there is one as this is an invaluable shortcut to me.
I have looked thought the shortcuts thread and didn't find it.