The price of a first-class stamp rises from 46 to 49 cents tomorrow and the cost of a host of other mail products and services will also increase following regulators’ decision last month to grant the U.S. Postal Service a temporary emergency rate increase. As FedLine noted a couple of days ago, both the U.S. Postal Service and a mailing industry coalition planned to contest (albeit for different reasons) the Postal Regulatory Commission’s ruling. In appeals Thursday with the U.S. Court of Appeals for the District of Columbia Circuit, both camps followed through. You can read the USPS filing here…