If you've not already, you should take a look at Buzan's "The Mind Map Book" (or one of the more recent ones). I picked it up several years ago and re-read it once a year or so just to refresh the ideas. Like you, I use maps (in the form of MindManager) to capture basic ideas and planning concepts. As much as I like MindManager, though, after re-reading the Mind Map Book I'm always a little disappointed in what I can do with it. Thus, my notebooks are full of hand-drawn maps that I just can't do on the computer.

At least not yet. I'm looking forward to trying out iMindManager.