Key insight: Small business customers want their banks to provide business management tools alongside traditional banking products.What's at stake: U.S. Bank believes the multiple product rollouts it's conducted this year can lead to deeper penetration in the massive small business sector.Looking forward: After the Minneapolis-based bank unveiled spending, payroll and bill pay products, an accounts receivable function may be up next.U.S. Bancorp's recent rollout of payroll and accounts payable tools is part ...