I just filled out the passport renewal form, and question 10 asks for the number of the passport book, which is not the same as my passport number (on the page with my photo), I called the pp agency to question this, and they said to use the pp number. I wondered why they couldn't make it clear what they really wanted. After reading this thread, it seems, that for the newer pps, there is NO confusion--mine is 9 years old...
In another thread on ft, the new proposed fee scale is listed. I'm willing to lose a year to not have to pay the extra fee of $82 to have extra pages added.