The Windows Mobile 5.0 Emulator has now been updated to support non-GPRS networks so you can demonstrate and test it much more easily!

Get the latest version here http://www.microsoft.com/downloads/details.aspx?FamilyID=c62d54a5-183a-4a1e-a7e2-cc500ed1f19a&displaylang=en

More details on the Exchange blog:

http://msexchangeteam.com/archive/2006/06/15/427970.aspx