The software I use for home automation set up has had a major update to 3.0. I've been beta testing it when it was known as 2.5 and there have been quite a few significant features added. There is now support for the Insteon thermostat adapter, which I've been using. There is also support for scenes and links, which allows the control of multiple Insteon devices at once with a single powerline command.

The Unoffical Apple Weblog has a quick write up on it as well as a CooconTech thread.