I came across a library that ported the .NET 1.1 version of the Data Access Application Block to CF: Data Access Application Block for .NET CF. It was pretty good, but there were several things that needed fixing for my situation, namely: removal of OpenNetCF, upgrade to .NET CF 2.0, upgrade to Windows Mobile 5.0, and upgrade of the Northwind.sdf database to the latest version provided by Microsoft.
Here is my port of the original work. I'll post updates (like upgrades to Enterprise Library for .NET Framework 2.0, January 2006) to the blog here, and my web site.
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.