The U.S. Postal service has launched a new mobile site. While the new site currently only offers package tracking, post office location search and two-way zip code look-ups, it is a solid start. The site will work on any phone with Internet access and is very easy to navigate.
The USPS is also apparently working on new apps for the Blackberry and iPhone. For more information, or to track that all important cellular accessory that you are expecting in the mail, go here.
Source: Lifehacker