Hyatt is offering instant platinum status (valid for 180 days) and a fast-track to retaining Platinum and achieving Diamond.
The key benefits of Platinum status are avoiding the worst room in the house, free internet, and a 15% bonus on points earning.
The offer is valid through December 30. New members receive their status instantly via the online link, current members need to call to register for the offer.
The elite status fast track component of the offer is 5 nights during the 180 day trial to requalify through February 2012, or 15 nights to achieve Diamond status until then.
Hyatt Diamond, in my estimation, is the best top tier of any major program at the moment (Intercontinental Royal Ambassador doesn’t count for the comparison). Hyatt matched Starwood on award redemption, so Hyatt points are at least as valuable as Starwood points for hotel stays. Diamonds get free internet and lounge access or breakfast, Starwood Platinums only get these at Westin, Sheraton, and Le Meridien properties (usually) that have lounges. Starwood Platinums may get more suites at checkin, but Hyatt Diamonds get 4 confirmed-at-booking suite upgrades per year.