I've been using Insteon for a few years now (insteon.com). It's like x10 done right. There are acknowledgments, grouping, security, 256 brightness levels, exten

I've been using Insteon for a few years now (insteon.com). It's like x10 done right. There are acknowledgments, grouping, security, 256 brightness levels, extended commands, wifi+power-line communications, and a 6-byte namespace (for no collisions).