Don't know about lightwaveRF, but I can probably help you with a HomeEasy genre solution. Believe it or not but we do have some radio transceiver 'development' products which have ben gathering dust for a few years... One such should allow you to control a HomeEasy device. If you think this might help contact me for further detail.
As for IDRATEK - IDRATEK over TCP/IP, well of course this has existed almost from day 1 in the form of the Cortex bridge object, but not very practical for small situations since it requires Cortex at both ends. Yeah, I know what you're going to say about porting to linux...
