In its SEC 10-Q filing today, Wells Fargo estimated that the impact of its new overdraft fee policies will be a $300 million after tax reduction in its fee revenue for 2010.

Quoting: "We recently announced policy changes that will help customers limit overdraft and returned item fees. We currently estimate that these changes will reduce our 2010 fee revenue by approximately $300 million (after tax), although the actual impact could vary due to a variety of factors including implementation timing and customer behavior in response to the policy changes."