I have the bracket. Has anyone made an AIB page for the tournament? If so then they need to tell me so I can give them the file to post. Otherwise, I will make the page and upload it. Lunin/Chase should let me know as soon as possible so people can see it soon.
Regarding the pro/am brackets, at some point the separation into pro/am brackets is just an arbitrary dividing line based on our judgment of players' skills, and often this line ends up being in a skill level where there isn't a whole lot of factual data, so my criteria for drawing that line are twofold:
Any place where there is a 'noticeable' quantum leap in skill level. 20 is an arbitrary number, so a cutoff based on who is ranked or not is equally arbitrary. We only rank 20 because it's a 'nice' number, not because there's anything special about the 20th ranked player compared to the 21st.
And second, any place where practical considerations (e.g. a 'convenient' number of people in both brackets) make it a good idea. In the future, I think if time is a factor, I think we maybe ought to take top 6, since that saves 3 rounds of play (well, really only 2 since basically always we're waiting for loser's bracket to catch up to that point) over top 4. This is assuming around 32 entrants; for closer to 16, top 4 is fine.