A JavaMO for JME would be widely portable. Blu-Ray players run JME as BD-J (for menuing apps, HTTP, etc). DVB and OCAP/ACAP use JME the same way. Lots of phones, including the Android spec, run JME. JME looks like the grand convergence platform. So a JavaMO would be easily (supposedly trivially) portable to all those devices.