As far as tickets go, it looks like the best way to see the film is to get a festival pass, but those aren't cheap, and its not yet clear which pass includes admission to the Houdini movie. However, I've been told by friends who have attended the festival in the past that individual tickets are sold at the door at the time of the screenings, and they rarely sell out. But this is depending on the theater size, and it's not yet known where the Houdini film will screen (please be at the Chinese!).
Everything else there is know at the moment is on the TCM Festival website.
I will keep drilling for info and report what I can as soon as I can. It's getting exciting!