Bloomberg: CBS is adding partners for its Showtime TV service over the Internet, securing distribution via set-top box maker Roku and Sony’s PlayStation before its debut in early July. Showtime announced the $10.99-a-month service Wednesday, joining the ranks of programmers letting viewers watch shows without signing up for conventional pay TV. The service will also be available initially on Apple products including the iPhone, iPad and Apple TV, New York-based CBS said that day in a statement.