Just set up Twine at a lake house 2h from my residence. Took me 5 minutes - beautiful!
When the temperature drops below 50F (we set the furnace at 55F) we know the furnace is out. Internet gear on a UPS with about 2-4h life so that things work even without power (the typical reason a furnace may go out). I'm sending email to an account associated with my home monitoring system (which uses Insteon and Indigo from perceptiveautomation.com) so I can take action about it there, but for backup I also have it text my mobile.
This 5 minute setup was fantastic compared to the previous 4 generations of remote monitoring I have evolved through in the past decade: (1) radio shack dialer connected to a thermostat, (2) regular tweets from a camera pointed at a thermometer (with a tea bag hanging from the ceiling vent to let me know if the blower was on), (3) webcontrol from CAI networks, (4) arduino. Most of the DIY solutions, including (3) and (4), have become cumbersome due to the fact that nearly all email services require SSL (this could be fixed with arduino, but not in 5 minutes!). Remote access also required lots of fiddling with dynamic DNS, again not a 5 minute solution and somewhat fragile.
Well done, SuperMechanical!