Processing 1.5 is the first released version that supports the android mode in processing. So I wrote a simple monome-clone in processing to test it.
Download the complete source here if you want to try it yourself.
The sketch uses the OscP5 library to generate or react to osc-messages, but unfortenatly processing still has problems resolving external libraries in android mode. So I added the oscp5.jar to the sketch using "Add File" - works like a charm.
The sketch is far from perfect - the target address of the osc events is still hardcoded, no support for multitouch events yet, etc - but its really nice to see how fast an android app can be made with processing
This is my Archos 101 running the my monome-clone
processing sound visualizer