Below are some images of the app running on my Samsung Galaxy 3S.
After a pinch-to-zoom.
Click on a node, and bring up information about them...
...and edit a node to bring up the on screen keyboard.
Or rotate your phone if you like landscape more.
I've been very happy to work on this project with a fun customer, that is paying me to learn about PhoneGap development and make a cool app. Eventually we may try deploying this on an iPad!