I got a chance to look closer at the MobileForms Toolkit from Resco, and you can see the result in the article Advanced UI Controls for .NET CF. The general impression is that this is now a collection of 11 mature controls that allow you (as a developer) to focus more on the business challenges than technicalities in UX design.

My personal favorite is the AdvancedTree control that is an enhanced version of the standard TreeView control, and it has great designer support for customizing the appearance as well as easy data binding (just a few lines of code).