Rogers Communications Inc. said Wednesday that Jack Tomik is stepping down as senior vice-president of media sales at the end of this month and being replaced by Al Dark. Rogers said in a press release that Tomik's departure comes after the successful implementation of a new multiplatform sales model. Coincidentally, Dark took Tomik's place as general manager of CBC/Radio-Canada's revenue group two years ago when Tomik first came to Rogers. Dark joined Rogers in April this year as vice-president of national sales....