So please tell us how to use this new, remote_temp feature.
For example, how do we designate which thermostat is the talker and which is the listener? In our usage of 3m50s, we have a network of thermostats such that several thermostats are within wireless range of each other. But there is a particular pair of tstats that we want to operate as you described because they are located within the same large room and each controls a separate HVAC system. Because of the physical arrangement of the ductwork, which we are not able to change, there is considerable interaction between the two units. We would love to try this new remote_temp mode and have one tstat control both HVAC units.
So if this new feature is ready for prime time usage, we are ready to try it.