The horse has been beated into a black hole by now...
Ok, do a search on the topic if you're new... you'll find enough reading material to keep you busy for a few hours.
That aside, there is NO RECALL on the TRAC nor ECU.
What Lexus is doing is acknowledging that some early production cars had issues w/ over-sensitive traction control modules, and they are replacing them for customers that fall within the VIN #'s and that are complaining. Just saying you want it won't get you the update. There is also an issue w/ the car throttle hesitating from a stopped, or near stopped position. This requires no update, just a reprogram of the ECU. Again, it's not for everyone, just those that fit the Vin #'s and that are complaining.
I have the problems, but the fix isn't worth the hassle as it's not that bad. I'll wait until next winter to get it done when all thehype has died down.