"If you are writting Pocket PC or Smartphone applications that you intend to have running on WM 2003 SE devices, these are two must-see webcasts. You'll learn how to make your application orientation- and resolution-aware as well as what has been done in the platform to enable as much backwards compatibility as possible."
There's one on May 12th for screen-orientation-aware application development, and another one on May 14th for resolution-aware application development. If you're a developer looking to develop for WM2003SE for the first time
or to refresh your product for WM2003SE, these sound like excellent webcasts to attend.