[May20th] This is now available for viewing online and download from the same link
Between now and TechEd 2008 we are planning to host a 5 part Webcast on Building Applications for Windows Mobile.
The first one is scheduled for this Friday (16th May). You can find the details on this link.
I would consider this Webcast series very useful for those of you wanting to get a jump start on Windows Mobile Application Development.