As far as I know jailbreakme works on 3.2.1 due to the PDF 'hole.' I am somewhat hesitant to jailbreak from now on as Apple is applying for a patent for a kill switch (engadget post sometime today, yes i'm lazy to paste link for now) which [as per my correct understanding] detects if the device has been jailbroken or not. Not too sure how far it will go as jailbreak is no longer technically 'illegal.'
As per the question asked by the OP, I do not know if they are shipping with 3.2.2 pre-loaded. I purchased mine 3 days after 3.2.1 was released and it came pre-installed.