Interface with the Zeo Personal Sleep Coach over USB with Ruby.
Depends on ruby-serialport, which is currently limited to Ruby 1.8.
You may have to do some source diving, as the documentation is basically limited to this file (don't worry, the source is pretty short, too).
zeo = Zerbo.connect('/dev/zeo')
On OS X, the device you want can probably be found in /dev/tty.usbserial*. On Linux, look at /dev/ttyUSB*. I can't speak for Windows, but the Python library works there, so presumably Zerbo can be made to work as well.
zeo.on_sleep_stage do |stage| puts stage end zeo.on_event do |event| p event end zeo.run