Maarten Struys just posted the source code for the samples he used in the first two webcasts in the series of MSDN webcasts that demonstrates how you can connect to the Windows Live services from a Windows Mobile device.

You can watch the recorded webcasts by following these links:

Webcast 1/4 : Introducing Windows Live Services on Mobile Devices.

Webcast 2/4 : Introducing Windows Live Services - Consuming RSS Based services.

Get Maarten's sample code : Sample 1, Sample 2

The next two will be presented by Jim Wilson as posted here.