http://www.techrepublic.com/blog/linux-and-open-source/make-sense-of-a-lot-of-messy-text-with-treeline/

even has a reference to "reverse outlining".

Thanks for the heads up.

Interestingly, what the article describes is something that I think Brainstorm is much better suited for. One could argue that Brainstorm is not a Linux program, but it runs fine in portable node under Crossover Linux.