Again, I will chime in here.
I definitely will be putting my - and my company's money on the line for it.
When the FF comes, I will be buying at least three - for myself.
Then, for the rest of my team(s), which should bring the count to something like 10 cameras.
I've just bought the first three kits for the team (K3 with three lenses).
I held off from buying more K3 kits because of what I think the FF will provide.
So, if the FF doesn't come soon, I am going to spend more money on K3 kits and Pentax will lose out.
So, I'm "all in" when it comes to the FF and the Pentax system - professionally and personally.
While I love the 645z, a Pentax FF makes more sense.