Microsoft seminars is always good source to know more about Microsoft technologies, I hope these seminar sessions will help you

Microsoft Distributed services seminars:

MSDN Support WebCast: Building distributed services on the Windows Communication Foundation
http://support.microsoft.com/default.aspx?kbid=907388

Support WebCast: Introduction to Microsoft Web Services Enhancements
http://support.microsoft.com/default.aspx?kbid=821377

Support WebCast: Message Queuing Application and Architecture Design
http://support.microsoft.com/default.aspx?kbid=816889

COM+ seminars
http://msdn.microsoft.com/seminar/mmcfeed/mmcdisplayfeed.asp?Lang=en&Product=103379&Audience=100402&frame=true

MOREINFO:
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Microsoft semiars

http://www.microsoft.com/events/webcasts/ondemand.mspx

Past Support WebCasts
http://support.microsoft.com/pwebcst?cid=C_7935

MSDN tv

http://msdn.microsoft.com/msdntv/