This in from the folks at Brooklyn Bridge Rehabilitation:
Over the upcoming long weekend, the Brooklyn Bridge will not be closed to Manhattan-bound traffic, or operating Brooklyn-bound detours between the hours of 6 am on Friday, September 3 through to 11 pm on Tuesday, September 7.
In addition, a special construction embargo is in effect for the 9/11 ceremony. All non-emergency work on the Brooklyn Bridge and all approach roadway lane closures is suspended from 3 pm on Friday, September 10 through to 11:59 pm on Saturday, September 11, 2010.
Newly updated traffic information can be found here, including earlier closing times at two locations, and diagrams of entrances and exits for the Brooklyn-bound detour over the north roadway of the Brooklyn Bridge.