I went ahead and put my name on the list. The 2-3 mpg better is all that I needed to be convinced. After a cai, catback, and the tuner, I should probably average over 20mpg pretty easily. I just talked to Jack from Unichip, and he was very informative. There is also a Unichip certified tuner just a few miles from me!
BTW: He said that the Flux tuner for the 07+ Tundra should be right around $1000 (normal price). I'm sure that with another GB, that can be whittled down a bit. He said that they are working on a near simultaneous release as the base PnP tuner. Right after this first run of the regular unit, they should be coming out with the Flux. Hope that's helpful to someone.
