Some people already have the last book, and there is no place available for them to post. I know it comes out on January 8th in the US, but it's already available in some other countries.
Unlikely. Books 1-4 and 5-8 have separate fora, so we'll likely end up with Books 9-12 and 13 & 14 forums for a total of four WoT discussion forums when the dust settles.