I'm one of the lifetime plats who was unable to get the 2007 book of coupons. Marriott Customer Service tells me there is nothing they can do; and after all, they are on the website. However, the book gives the coupons for the entire year (I'm told) whereas the website only gives the first set of coupons. Thus, I have no information as to the validity date of future 2007 coupons.
I'm glad this thread was started, as I'd very much like a set of these coupons going forward as well as any other information sent to platinums with their renewal documents.