I use mindmaps extensively. Right now I am mostly using Recall Plus.
http://www.recallplus.com/index.php
I like it because it kind of works like flash cards in a mind map mode, but be warned it has a learning curve. To get fast with it (ie fast enough to note take in the classroom) takes time and knowledge of the shortcut keys.
Tony Buzan has an entire site devoted to mind mapping.
www.thinkbuzan.com
he wrote the book called mind maps. he is a bit rigid in his implementation, but his method are a great place to start.
This blog is pretty good:
http://mindmappingsoftwareblog.com/
So, the reason recall plus is pretty awesome is that you can also pull images in with labels, then block out the labels with attached cues/questions, then it lets you test yourself on the image (ie anatomy)
However, putting together mind maps can be pretty time intensive. I learn best if I hand draw them, but we deal with so much information and as such a rate, that computers work best for me. There are free software programs, but so far recall plus has really been the best thing I have seen for usable at this level.
I'm a very kinesthetic learner, with some visual learning ability. lectures do nothing for me. the mind maps let me organize the lecture in a way that works. but it can be really hard to do with a disorganized lecture. traditional mind mapping didn't work very well for me in anatomy or physiology, but the recall flashcard programs did. also, I don't find it very useful for behavior, nutrition, parasitology. It has been immensely useful in pathology, pharmacology, and clin path. it isn't a method many folks use....and some students find it frustrating to even look at a map (students that do well studying by outlines seem to think it is way too alien.)
The absolute basic concept of a mind map is that you start with the main idea. ie 'neuropathology' and then you put your major categories radiating out from it. then the details of those major categories going out, etc. Now, it is best to try to break things up into chunks so a single map doesn't become huge (generally these are called child maps) so in my antibiotics mind map, I have beta-lactams, inhibitors of metabolism, etc.
if you google 'mind maps' and look at images, you will see some amazing ones out there.