I am in the same boat.
My plan is to use a security system that I can integrate the lighting with then use LMCE to talk to that.
I am a bit funny about having a PC control * in my house, so using a embedded device to control the "critical" components of the house makes more sense to me. My plan is to stage me HA fit out in the following way.
I am building a house in WA and I am currently drawing up the plans for "smart wiring" (note: I have LMCE running at my current house but only to play with and do my HTPC shiz.)
Anyway after the house is built and all the wiring in place. The first step for me is to install the security stuff (i will be using an elk-m1g.) All my critical stuff will be controlled by this, security, lighting, etc.
I will then need to integrate this with LMCE (as this is what I will be using to present a shiny control interface to the house
) and then all the other little bits, climate, reticulation, curtains, voip, etc etc
This is a WIP and my plans will need to be expanded on but thats the gist of it.
So yeah I guess what I am saying is I too am looking for a lighting solution that will work well in AU and not cost my first born. Ohh yeah something that is bi-directional too is a must!!