Oh, I downloaded Mindscope a week or so ago (maybe you posted it on r/productivity?) but hadn't time to open it. Did now, it's really neat!

Add org file "support" (org files can have links to other files, they are from org-mode in emacs) and I'd use it more than email :D

Edit: oh, found an org-opml editing mode! I'll play a little more with it and then quite likely unlock the full version :)