>> The District’s next sales tax holiday starts Friday, Nov. 23 and lasts until the following Friday, December 2. [WJLA] >> Mayor Fenty and Schools Chancellor Rhee announced today that every D.C. classroom will have a working desktop computer by February under a $4 million technology initiative. [WaPo] >> Maryland voters will get to decide in a special November 2008 referendum on whether to allow the state to install up to 15,000 slot machines…