Built ten of these puppies for making collaboratory electronic music, each features a rotary push button encoder and 8*8 tricolour LED matrix. They communicate using XBee and have an Arduino ProMini for brains.
http://registeringdomainnamesismorefunthandoingrealwork.com/blogs/
clever stuff,
do they update the display like the apc40 or launchpad does?
Yeah they get sent data every time the live set changes state.
you going to share the code? this is a rad little project.
also, im curious to know where you need java and why you cant just use Max for all the communication.