I would like to have mind mapping (like http://www.mindjet.com/ http://www.mindjet.com/) right inside excel (as well as for other office applications) but it sh

I would like to have mind mapping (like http://www.mindjet.com/ http://www.mindjet.com/) right inside excel (as well as for other office applications) but it should be tightly integrated. It seems to me such type functionality might be useful for data crunching and modeling with full brain thinking. Spreadsheets enable only logical half of brain so there is room for improvement.