Man. jk110 took the words out of my mouth. Although it would be cool to see a newer version of the Nav software, I am soooo dependent on the screen lock override. Also, I really haven't had too many problems with the 5.1 mapping in my area. At this point, I would only upgrade if someone finds out if there is an override with the newer and mysterious v6.x, that apparently some dealers are denying exists.

Anybody have a good friend at Toyota Corp? ;-)