Do you have questions about mobility and how to implement it using Windows Mobile devices and .Net? If yes, then it may be worth a look at a Michael Yuan's blog, where the author presents the concepts behind mobility, design and implementation using .Net and smart devices.

As an example he created an Amazon web services client for Pocket PC and Smartphones (described here), and the source code can be found on his personal blog.

The author also presents a couple of suggestions of web sites and books where interested developers can find more information.