My truck at 3000 miles had this camshaft failure. I was told that only 40-50 other 5.7 motors will experience this problem.
Mine was manufactured on 02/07 in Indiana. I beleive the others would have been built around the same time frame.
Oh, toyota give me 70/100k platinum warranty w/ zero deductible on my truck as well as replace the entire motor.
And they are paying one month's payment for me also.