The GM release of the iPhone SDK 3.2 is available in iPhone Dev Center (login required). Even though this build is labeled as "GM" and this will probably be the final build before the iPad gets into the hands of consumers, and even though the official policy is that development material is covered by NDA until it goes GM, this build appears to still be under NDA, which means no iPad technical posts yet. Sorry.
The release notes and license agreement are pretty clear about the fact that this is still considered pre-release software, so the NDA is still intact and we have to wait a few more days before we can start discussing the nuances of iPad development. I'm assuming that come April 3rd, it will be considered "released". At least, I hope we don't have a repeat of the original iPhone NDA situation.