I received my first written recall notice by mail from Toyota Canada in March 2011. They have followed up with a second letter in June 2012.
When I have brought my T4R in to the dealership for routine service (oil/filter) the service advisor asks me if I want the "safety improvement" on my pedal.
As it is voluntary, I have decided to decline. The notification will stay on the vehicle (and in Toyota's computers) until it is corrected - thus if/when I sell or trade in my T4R the next owner can decide whether or not to have the "improvement" done.