Just got an email with information to pre-order (will ship out in April) the Nest Temperature Sensor. It included a unique link & code to save $20 Off.
Retail for one sensor is $39 - $20 = $19 & Free Shipping
3 pack is $99 - $20 = $79 & Free Shipping ($26 per)
I'm already a Nest customer, so check your emails if you are. Subject was "Introducing the Nest Temperature Sensor."