Peek feature
 

I love the fact that you can scroll panes without first activating them. In the similar way, it would be nice if panes reload just by going over item in the Data Explorer pane (without updating any of its attributes!). At the beginning, it would be enough if only Item Text pane reloads (maybe with Item Notes pane as well), this could ensure faster loading times (no need to reload related item details pane, parents pane, etc.) so that this "peek" feature would provide faster way to navigate the tree when user is looking for something.

Hmm, a bit like the Office 2007 hover/preview feature? Interesting, though I can't think of how I would use it just now.

Jim