Bitter Script Reader at 2012-10-19 22:11:40:
Hey Scott - I've got a four-part series on my blog discussing the difference between the June 2009 draft and what made it into the film. Some pretty big differences in some cases. Here's a link to part 1. All the other parts are linked through it.
http://thebitterscriptreader.blogspot.com/2011/01/black-swan-script-vs-film-part-i-lily.html