I think this might interest some here. My colleague in the WAIS Group at Southampton University, Frode Hegland, has been developing an interesting (Mac-based) writing app. See this demo for his ‘Author’ app and associated tools.
There is a bit more depth to this than might be assumed at casual glance. Folded into these apps is his recollections of many discussions with the late Doug Engelbart, and his views on software augmenting our abilities. The ‘visual meta’ might appears odd but arrises from a lot of discussion in the group about a way to help fix the broken-ness of current citation practice. Visible metadata might seem hokey but it is a genuine attempt to patch our broken present to a properly working future.
This has nothing directly to do with Tinderbox other than I believe it might be of interest to this community, even if only to know about it.
Disclaimer: the app author is a colleague and I’ve been involved in many discussions surrounding the app, but I have no personal link to the project.