Would just add that I was a already a Platiunum member heading into 2010(I only travel for lesuire); and took the advice to try and get Hyatt to upgrade me to Diamond.

Interestingly enough, when I called Hyatt, they 'enrolled me' but just in the sense that I was on the fast track to qualify for Diamond status in 180 days.

However, taking the advice of others, I emailed Hyatt, asking for instant Diamond status. They replied within 15 minutes, and gave me the upgrade.

Thanks to that email, I just used one of the 4 suite upgrades, for my upcoming 7 night stay in Maui. That sinlge email saved me several thousand dollars (for a suite that I never would have booked otherwise).

Thanks everyone in this forum, and to Hyatt!