First, I'm glad to see all of the excitement around MIX07! This is shaping up to be an amazing event, and I hope I get the chance to see everyone there.
I'm responsible for the "bits" we hand out at the MIX07 conference, and I thought I'd take a moment to answer a couple of the questions that have been asked on this thread.
Q. "...when we hear X copies of Expression were sold will it include the number who got 'free' copies at conferences like mix?" A. No. It’s a Special Edition and separate from what will be available to the general public.
Q. "Also is this built into the cost of the Mix07 conference or are they really free?" A. They are really free. It is not part of the conference fee. Although the Expression team was already considering a giveaway, customer feedback always has an impact.