I did some research and I found a deal that came out last year on Aug. 12:
From Aug. 12 through Dec. 19, 2009, guests will save $400 when they book a 4-Day/4-Night Disneyland Resort vacation package, featuring Disneyland Resort hotel accommodations - Disney's Grand Californian Hotel & Spa, Disneyland Hotel and Disney's Paradise Pier - and park hopper tickets. The offer is valid for arrivals Aug. 23 through Dec. 20, 2009. Pricing starts as low as $87 per person, per day, at Disney's Paradise Pier Hotel.*
I'm hoping a similar deal will come out this year.