(Lovely program - thank you for such great work)
I'd like to be able to insert hyperlinks in the notes. Ideally a right-click or similar would then offer a hierarchical menu of the current map's nodes for selection, plus an option to browse for any file as the url target. Even better would be the option to select any map (maybe it has to be opened first), and insert a node from that. A right-click option would allow you follow the xlink directly from the note. If a new node (could be dynamically inserted via the above menu with the name of the hyperlink you'd have something much better than a wiki-based note system.