Portfolio ysis?

Our common stocks consist of Anheuser Busch (5.5%), Campbell's Soup (4.5%), Coca-Cola (6.3%), Eagle Materials (4.4%), Exxon (21.8%), GE (15%), Lowe's (3.6%), Novartis (7.3%), P&G (10.8%), Progressive (3.4%), Ruth's Chris Steakhouse (3.6%), Starbucks (5.6%), Time Warner (3.2%), and Western Union (4.3%). Our IRA is invested in the S&P 500. The 401-k is invested in U.S. Bank and bonds. IRA and 401-k account for about half the total. There is also some money in international funds and gold. Is this a good mix? What about the individual stocks? Are they diversified enough?