JobDig, the creator of niche job boards, has expanded into five local markets, including Tucson, Ariz.; Salt Lake City; Amarillo, Texas; Little Rock, Ark.; and Chattanooga, Tenn. Each market gets a local print edition of the free weekly JobDig newspaper, plus local Web sites that JobDig creates with broadcast and print partners. JobDig reports that it plans to expand into five more local markets in the United States this year.