Ok, Trane makes these units right now:
GAM5 - constant torque blower
TAM7 - variable speed blower
TAM8 - variable speed with communicating functions
Now here comes the new one.
TAM9 - variable speed, communicating, COMPLETELY WIRELESS controls. Stick it in the closet, mount the stat on the wall and when you are done with connecting drains, refrigerant lines and incomming 240, you can walk away.