I've had a lot of emails over the past couple of months asking about Public Folder support in Exchange 12 (or lack of it).
I am not sure where this information came from, but Exchange 12 does indeed have Public Folders available! With our support lifecycle, that means we will Support (you can call Product Support Services and get help with PFs) PFs until 2016 if we stay on course for release of Exchange 12 at the end of this calendar year. As my mailbox is currently on our Exchange 12 Dogfood servers, I can attest that I have access to Public Folders (even though I personally don't use them).
So, let's just put this topic to rest and know that we do have support for Public Folders in Exchange 12.