Ok, went to a Brandon Sanderson book signing today...I'm not sure what has been written in this thread about his WoT writing, but here's some of what he talked about
First, he is a really nice guy, and holy **** is he a nerd, haha - though, being a fantasy writer I should have expected it, and I can definitely smell my own kind
Although he plans on submitting the manuscript as one work, he suspects that due to the size it will be released in two volumes
, making the series 13 long...which he said he'd gotten emails from people requesting that he actually do that due to the significance of the number to the series.
He's writing it in chunks, basically picking two characters at a time and one particular scene towards the middle of the book and it writing up to that point, then hes going to continue from there when he has all of the characters. Final word count he's aiming for is around 675,000.
He also talked a bit about how he was approached to do the project...absolutely no warning, Harriet just called him up and asked if he wanted to do the last book. He said he actually e-mailed her the next day to reassure her that he was, in fact, not an idiot and was capable of talking in full sentences despite their previous day conversation.