Jorge Peraza has published a great blog entry on the Windows Mobile blog talking about how to develop widgets for Windows Mobile 6.5.

More information can also be found in this MSDN article

What will you build?

John O'Donnell
Microsoft Dynamics ISV Architect Evangelist
Microsoft Corporation
 (b) http://blogs.msdn.com/jodonnell

 (b) http://blogs.msdn.com/usisvde

 (w) http://channel9.msdn.com/Wiki/DynamicsCRM/HomePage/

 (t) http://www.twitter.com/jodonnel