Hey, no thread on this yet! I'm in St. Louis helping out, and will be doing the twitter feed throughout the event @CCSCSL
The format is new this year. After seven rounds the top 4 players will advance to a Championship quad where they will play off against the other three top scorers. Note that their scores from the preliminary 7 rounds will be carried over. Note that this makes rematches possible, so you could see two Nakamura vs Kamsky battles this year!
The website with all of the information is at
http://saintlouischessclub.org/conte...s-championship
Also my sister (WGM Jennifer Shahade) is doing live audio broadcasts with GM Maurice Ashley at ChessFM.