Will Amazon's Sunday Shipping Save the Postal Service?

Amazon's move to start to sending Sunday deliveries through the United States Postal Service (USPS) will generate it some serious revenue. It will also likely improve the agency's employment picture, as the Postal Service had only limited Sunday operations in the past.

Amazon's a leader, and it wouldn't be a surprise if smaller Web-based retailers have little choice but to also team up with the Postal Service to keep up.

Amazon and the Postal Service aren't disclosing the costs or the length of the contract. They also are not disclosing volume projections. Los Angeles and New York City will begin offering