More on posters…
In my view, it is a mistake to think of posters as a way of embedding a web browser in a Tinderbox map.
Instead, think of the poster as a canvas on which you can draw, using any of the myriad visualization tools that have been, and continue to be, developed for embedding diagrams in web pages. If you have a diagram that you might embed on a web page, you can now embed that diagram in a map view — and it can draw its data from your Tinderbox document.