The Round-Up: Friday By Observer Staff • 03/09/07 8:33am Saving a seedier Greenwich Street block. [NY Times]Court allows Washington Square Park renovation. [NY Times]Fed: Americans loaded up on mortgage debt in ’06. [NY Times]City wants to spend $100 M. for Atlantic Yards land. [Daily News]Last Brooklyn roller rink closing. [Daily News]Did we miss any New York City real estate news this morning? Please send along tips and links.