An adult epic pass is $599 for a full season of phenomenal skiing or snowboarding at six mountain resorts (Keystone, Breckenridge, Vail, Beaver Creek, Heavenly and Arapahoe Basin). There are no restrictions, no blackout dates and the link listed below suggests it is on sale through November 22, 2009.
Epic Pass Info

EPIC SEASON PASS FOR 2008-2009 SEASON

UNLIMITED USE (NO BLACKOUT DAYS) AT ALL 5 VAIL RESORTS & ARAPAHOE BASIN

The Epic Season Pass is completely unrestricted and unlimited at Vail, Beaver Creek, Breckenridge, Keystone, Heavenly and Arapahoe Basin. Vail says this pass is on sale until November 15, 2008.