Well, the announcement is marked November 18, and for me it's still well in November 17, but here it is:
X PRIZE Foundation Opens Official Voting for the $25,000 “What’s Your Crazy Green Idea?” Video Contest - X PRIZE Foundation press release - You just have to choose from 3 videos, not all 133.
MIT Sloan School Student One of Three Finalists in “Crazy Green Idea” Contest to Create Energy X Prize - Xconomy Boston - The MIT one suggests a prize for communities that reduce their energy consumption the most. This matches suggestions Tom Vander Ark of the XPF has made for community-based prizes. Another proposes energy independent, off-the-grid homes that are economically feasible. The third proposes a quickly and repeatedly rechargeable, economical, and recyclable battery capable of driving a car 100 miles.