Howdy, I'm one of the developers on the Windows Mobile Partner Response Team. I'm interested in a .Net CF development on the side - I'm in the process of writing an offline RSS Reader, and hitting across the features (and limitations :) ) of the framework :). As for the SDK's, it looks like one of the things that would be useful for developers (perhaps part of opennetcf?) is some managed wrappers around WM2003 SDK features (off the top of my head - Connection Manager, services.exe integration, etc).
Anyway, feel free to drop me a line if you have any ideas (on the app or anything else :) )