I have blogged about this iPhone Mindmapping software that is really good and how you can use it to incorporate into your GTD system.

Their Version 2.2 is currently in the approval stage and what i like about them is that they don’t rest on their laurels but are coming up with more and more ways to make this mind mapping software as functional as the desktop applications.

Here is a video showing how you can map relationships between related nodes.

What i really hope to is that they can come up with Tagging and Tag filtering of nodes. That will be awesome

Also check out:

GTD Series Part 6:Project Review through iThoughts Mind Mapping Software

Mind Mapping Software for iPhone:iThoughts Review