HA! if only it were that easy of a repair.
I suspect it may be something in a CAN (Controlled Area Network) that is having a malfunction. I saw the thing Nightline did at SIU, but that involved shorting a circuit out. Entirely possible as well, but some of the failures people are reporting seem intermittent.
My humble opinion - We've gotten too electronic in our cars. Fly-by-wire throttles don't impress me.
Sucks for Toyota and those families that have lost loved ones due to this.