Ran across this recently, had to make a note:
http://danthompsonsblog.blogspot.com/search/label/Servo%20Tools%20For%20Maya
Download:
http://www.creativecrash.com/maya/downloads/scripts-plugins/utility-external/export/c/servo-tools-for-maya
Also requires:
http://pyserial.sourceforge.net/
Servo Tools for Maya
"Servo Tools For Maya is a Python Plugin that sends rotational values over USB to the Arduino Micro Controller. These values are then converted into Pulse Width Modulation which is used to control multiple Hobby RC Servo Motors."Homepage:
"Applications for the plugin are only limited to your imagination. Some popular examples could be to drive complex animatronic puppetry or kinetic sculpture art installations."
http://danthompsonsblog.blogspot.com/search/label/Servo%20Tools%20For%20Maya
Download:
http://www.creativecrash.com/maya/downloads/scripts-plugins/utility-external/export/c/servo-tools-for-maya
Also requires:
http://pyserial.sourceforge.net/