United States Postal Service USPS has gone mobile and a lot of people my find this site very useful. Some of the most popular functions currently available via desktop are now available on mobile devices. The new features include Track & Confirm, Post Office locations, and the most popular application, ZIP Code lookup. The Postal Service is also designing applications for BlackBerry devices which take advantage of additional capabilities, such as GPS. No time frame on the app is mentioned though.
You can access the mobile site by going HERE! http://m.usps.com
You can see the full press Release HERE!