Nest's Learning Thermostat and Protect smoke detector are now part of a much, much larger universe. The company has just launched a developer program that lets third-party apps and devices talk to Nest hardware, making it do things that aren't possible through official software. The initiative is kicking off with a whole host of partnerships in place, in many cases with feature updates either available now or due in the near future. Chamberlain's garage doors can now tell your Nest thermostat when you're home, while Mercedes-Benz lets you check the temperature on the road; Logitech's Harmony Ultimate remote can lower the heat in mid-movie, and Jawbone's Up24 fitness tracker can tell Nest when you wake up.