I have used and even written about Personal Brain. It is intriguing, but at least for my kind of work (text heavy, lots of reference material) I find that it doesn't scale very well. But it is so distinctive and interesting that it's certainly worth a look. I find MindManager better/easier for graphically-oriented organizing, and a normal outliner, including the not-quite-normal but useful BrainStorm, to work better with straight text. And, of course, Zoot to keep track of large-volume reference material.I use Inspiration for thinking and outlining and I love Scrivener's for writing (and for keeping everything in one place).
I'm going to check out Zoot.
What I need is ONE piece of software that keeps everything in the same 'document': notes, to-dos, research, factoids, and whatever it is I'm writing.
Scrivener's comes very close.
mind mapping templates available for download