I'll be shocked if we don't see one on Tundra soon. Several people here and on
edmunds have discussed frame rot issues - including on person from New Hampshire saying his 00 Tundra would not pass inspection due to frame rot.
On my 2000 that I just sold, it was obvious that it would have some issues down the road - especially on rear shock mount towers. And I have been very faithful to wash underneath since I bought it new. This is another ding in Toyota's reputation, I'm afraid.