Since the launch of AT&T's 3G MicroCell, users on Verizon and Sprint have been eagerly awaiting on a 3G update to their respective coverage boosters. PreCentral forum user Impulsebuyer received a replacement to his Airave unit, and while the design has been modified, EVDO appears to have been left out. Another slight change is a new location for the GPS portion of the unit (it's under a door on the top of the device now).
As of now, it appears that the form factor is the only major change to the Airave (in fact, it looks just like Verizon's unit). I expect that we'll see the revised design making its way to the retail stores soon.