The Shenzhen Daily has an article about the loosing of mainland visa restrictions:
VISA restrictions on foreigners entering the mainland via Hong Kong as a security control during the Beijing Olympics have been eased, Shenzhen and Hong Kong officials said Friday.
“The popular ‘144-hour’ visa for groups of foreign tourists traveling into Guangdong from Hong Kong by land, which was canceled during the Olympics, resumed Oct. 16,” Yi Nengquan, vice chief of the Shenzhen Municipal Tourism Bureau, said in an exclusive interview with the Shenzhen Daily on Friday.