You may know Sean Liming as one of the Windows Embedded MVPs, or as the book author for the extremely useful Windows XP Embedded Advanced book, Sean has been working hard on yet another extremely useful book, Windows Embedded for Point of Service / Pos for .NET Step-by-Step - just check out some of the topics covered.
WEPOS Unattended Installation, Remote Installation, and Remote Boot Customizing the WEPOS Platform POS for .NET Architecture Creating and Managing Service Objects Several POS for .NET applications written in VB .NET and using a few POS devices: bar code scanner, MSR, line display, cash drawer, and receipt printer. 18 hands on exercises
If you are working with WEPOS or are considering WEPOS then I would recommend you take a look at this book (when it's available).
Sean is also working on a .NET MicroFramework Development Kit