Planet Waves Chordmaster

Trying out the Planet Waves Chordmaster app for the iPhone. Another nice chord dictionary app.

http://www.planetwaves.com/PWChordMaster.Page

Still looking for the uber-chord dictionary for guitar. What I'm looking for is something that will help visualize chords through a progression for a given position. I'm looking for an app that can help me learn more chords by organizing, and presenting them in some meaningful way.

For example, would like to start with a G major in some position, and have the app present different exstensions, sustains, etc, in such a way as to make remembering them easier. (For example, change one note and go to a G9, or Gadd2, swing a different way, and show a Gsus4, swing again and go to Gmin.....)

But, as far as dictionaries go, you can never have too many. And, this one is very useable.