Wondering if anyone has any experience with the Google App Inventor?

I'd like to build a very simple app that displays a numeric keypad, and then simply outputs it to the phone's bluetooth.

Apparently from what I read, the App Inventor is a very simple package to develop Android apps, without having to go the Eclipse way. Also pretty much designed for the hobbyist, as it has canned commands to control Lego Mindstorms, letting you use all sensors on the Android in your project.

Would love to share information if anyone's been at it.

Regards,

Anand Dhuru