Extension for Jim Harbaugh?

Jim Harbaugh signed a five-year contract with the San Francisco 49ers in 2011, which means the coach still has two years remaining on the deal. After leading the team to a Super Bowl and two conference championship games during his three-year tenure, it's no surprise that he is looking for an extension and increase in pay. The Niners appear interested in extending him, but money could be a stumbling block.