Rick, I'm extremely interested! I spend my dayjob hours working with dynamic XML-based learning interactions in Flash for a university, and developments in nonlinear storytelling/information trees has been a lifelong interest of mine. Labyrinths, Designing Virtual Worlds, Hamlet on the Holodeck are all fascinating books on the subject if you haven't read them yet. Definitely PM or e-mail me if you're interested in potential development help. At the very least I'd love to be kept updated by your project.
I'll check out the links you've posted, for sure. I've got Notepad++ but hadn't taken the time to explore it's featureset, fully.