I was listening the the smarthomeshow where they interview the CEO of control4, he mentioned they licence "liberally" their protocol SDDP, what made my ears prick-up is he mentioned one on the users of this protocol is Sonys Bravia tv's (which I have) and further googling says Tivo too (which I have as part of my Virgin cable)

Where Google has failed me is whether any other home automation systems or apps support this protocol and how it works, has anyone else come across it?