I can't read the release notes, but even if I could it's unfortunately still under NDA so I cannot post the details. One thing I have seen noted on another Apple dev focused site is that SDK 3.2 is iPad ONLY. I.e. it will not run on iPhone or iPod. Annoying, since what little of the API diffs I got to see before the Apple web server crashed(!) indicated it would be really handy for iPhone devs too.
I finally have fibre! Had to leave the country to get it though.