The Windows Mobile Line of Business Solution Accelerator is a sample line of business application that showcases the latest design principles and technologies in the mobile space.
This has been released to the web and can be found here http://www.microsoft.com/downloads/details.aspx?FamilyId=428E4C3D-64AD-4A3D-85D2-E711ABC87F04&displaylang=en at the Microsoft Downloads site.