Mind mapping has fascinated me for years. I almost hate to admit it, but after reading Hannibal (Thomas Harris) I became enamoured of the idea of a mind palace. I even went out and found a bunch of promising links, bookmarked them, and never really took it up, mostly because I'm lazy.
Nevertheless, the idea is in my head and won't go away, so I expect I will eventually try both out. Merlin Mann asked about Mac mind mappers, and as before, I bookmarked a few of these ones and never really got back to them.
Some day, after I invent the perfect mousetrap...