Seems like it took forever getting here, but the long delayed 40-story tower at 10000 Santa Monica Boulevard is finally ready to get off the ground.  Or more accurately, into the ground.  Earlier today, the Department of Building and Safety gave developer Crescent Heights the go-ahead to start excavation and shoring work for the tower's two-level underground parking garage.  The 2.4 acre lot, positioned across the street from Beverly Hills' western border, has awaited re-development since 2006.  Ambitious plans for a 45-story condo tower designed by Jean Nouvel were scuttled by the global recession, allowing Crescent Heights to purchase the land at a discount in 2010.  After sitting on the property for several years, it looks like Crescent Heights is now ready to make their move in Century City (and maybe Hollywood).  While earlier reports stated that 10000 Santa Monica would contain 283 condominiums, the project's official website indicates that Crescent Heights has instead opted to move the project forward as luxury rentals.  Either way, Handel Architects' 483-foot tower will soon re-write the Century City skyline.