Well then, I want to thank very much William and anyone else who helped implement this. With 600 nights and (I believe) 12 years of Platinum I can enjoy Starwood without the occasional end of year stress about re-qualifying.
I notice that on my account it now says that I joined in 1999. Until recently it said I had joined in 1997. So I guess that obviously means that being a member of Westin or Sheraton's program doesn't count.