MindManager for iPhone and iPad

An App version of the popular MindManager mind mapping software Mindjet for the iPad and iPhone is scheduled to come out around June 15. Costing 9 and $7 respectively.  I liked the software on Windows, particularly useful for those who like to be organized hierarchically.   The concept is very useful to teach to students.   I think it should have even greater value having the diagrams available on  a mobile device like a pad.   Here I am assuming the App versions are considerably less  powerful than the Windows version, since they cost 1/25 as much.  I am looking for a general,simple mind mapping App for the iPad.  I was first recommended iThought HD.  We will see.