The UMPC Display Emulator Beta application enables you to test your application’s layout and screen behavior as it appears on a UMPC.

Link:
http://www.microsoft.com/downloads/…

Check out these posts too:

  1. Ultra Mobile PC (UMPC)
  2. Ultra-mobile PC (UMPC), What happened?
  3. A sign of the UMPC future
  4. Internet Explorer 7 Beta 3
  5. Windows Desktop Search 3.0 Beta Engine Preview
  6. Internet Developer Toolbar beta 2
  7. Microsoft XNA Game Studio Express (Beta 2)