According to PocketGear:
"Mindmapping is already a well known technique to create and organize complex concepts or to do brainstorming. A computer combines the graphical expressiveness of the Mindmap with the computer's strength to restructure, search, move or copy and paste the content. And software can even do more: Keep track of your tasks associated with the concept, focus on specific topics, filter your topics according to certain attributes or export them to XML, HTML or Text - with Pocket Mindmap you have this strong team of tools always with you - in your Pocket PC or Handheld PC."
This software is normally $42.00, but if you click the post link you can get the goods for $33.60 this week.