Starwood has a teaser up on http://www.starwoodpromos.com/eleven/ for a promo that runs for 11 days starting on November 11th, 2011.
By paying extra $11 the guest can get one of the following:
Daily breakfast for two
A room upgrade
Starwood Preferred Guests member will also be eligible for:
Special bonus for SPG® Members:
Receive 1,111 bonus Starpoints® per stay with this offer.
Right now it is not clear if this apply only for “Best Available Rates” or whether corporate and other discount rates would also qualify, although I doubt that. These extra 1111 Starpoints can be “expensive” if you need to book a special rate plan. Stay tuned for more.