Personal Brain is an amazing tool for mapping your brain. You might even call it a true mind mapping tool. Listen to the podcast and you hear why I think so. I plan to make The Brain a key component to my personal knowledge management toolkit so I expect that I'll return to visit Shelly and Harlan again. If you have comments or questions, post away. I'm not sure that I can or will answer all of them but perhaps some of my other readers will.
I've just posted the first of a two-part interview with Harlan and Shelley over on my Notes on Productivity site.