As reported in the Las Vegas Advisor:

Q: We were sorry to hear of the Boardwalk closure. What are the plans for the site?

A: The little old Boardwalk closed on February 9 to make room for a parking garage for MGM Mirage's 66-acre $7 billion Project CityCenter metaresort.

The first phase of CityCenter will consist of 18 million square feet of developed space, including a 4,000-room hotel-casino; three 400-room boutique hotels; 1,625 residential units in condominiums, hotel-condos, and private residence clubs; and a half-million square feet of retail, dining, and entertainment space.

Touted as the "most significant privately funded project in the United States," CityCenter is scheduled to open in late 2009.