Apple is inviting developers hoping to offer apps for the iPad on the day it ships (April 3) to submit their software to the iTunes team for approval by March 27.
Developers who do get their code into Apple in time have a chance of seeing their app in among the first collection of apps made available for the iPad when that product first begins to reach US customers. Submission by the date doesn’t guarantee Apple will approve apps in time.
Source: Distorted Loop