Ask again when you're mostly done. Chances are, a lot of people will say 'oh, I'll read it' when confronted with it, but not very many are going to jump up and say, 'sure, I'll be ready to read it whenever you finish it, even though we have no idea when it's going to be finished, what it's about, or who you are.'

Of course, I could just be pulling this from my nostrils, and everyone really will pop up like the toys in a jack-in-the-box factory.

-Craig