Many receivers these days come with AirPlay, so if you have Apple TVs, iPods, iPads, etc.. it should all integrate pretty seamlessly for streaming media wirelessly. Personally don't have any Apple devices so can't comment on them.
Schlage makes a lot of different electronic / touchscreen / wireless door locks. It would freak me out having my door locks accessible like that, pretty satisfied with needing a physical key.
Philips Hue were the wireless lights that I think everyone was talking about on MoreNetz or back on FOH. Haven't picked up any of these, but am kind of interested.
For wireless sprinkler controller I use: IrrigationCaddy with a Toro Wireless Rain Sensor and WiFi Adapter
Thermostat I use 2x Nest 2.0, one for upstairs system, one for downstairs.