In the last 2 days, Zarhym updated the Patch Notes and added a lot of the changes discovered in the last few builds deployed on PTRs. Here are the full notes with the latest additions highlighted in green. Please bear in mind these changes are not exhaustive and are subject to revision at any time during the 3.2.2 testing phase.
World of Warcraft - English (NA) Forums -> PTR Patch 3.2.2 Notes - Updated 9.11.09
(via mmo-champion, thx!)