This question was asked to me a while ago by Martin and I kept forgetting to post yet. Looking at the pre-reg for the Bowling Green AMís reminded me of it. Pro/Open players CAN play as an Advanced Amateur per the PDGA standards. Thereís at least one player doing that in this year BG AMís (and yes heís excepted cash). If your rating is BELOW 970 and youíve cashed as a Pro you can still play Advanced. See this link, Table Three, bottom right under Additional Information:
http://www.pdga.com/files/documents/09T ... dsV1-2.pdf
So if your rating is UNDER 970, and you've cashed as a Pro, you can still play the World's or the BG AM's as a Advanced player.