All good suggestions!
As you know, some of my macros ([M24]) combine keyboard navigation with activation, which I find very useful. Maybe holding down the Ctrl or Alt keys with one hand while moving the green ring around with other the other hand on the cursor keys could perform special tasks, such as highlight all the links for a particular thought, or show all the labels for a particular thought. Or maybe there could be an Option which when enabled, automatically opens a Thought's attachment when the green ring is over it. It might be possible to program "halfway points" (midway along a link) where the green ring can pause to allow deletion of the link, after which the focus returns to the active thought (green ring disappears). There's enough in here to keep the PB team's grandchildren programming for years. I'd just be happy if the Notes Pane got updated each time the green ring selects a different thought.
PB 184.108.40.206 on Windows XP, J-1.6.0_17