Wireshark training videos

Some short videos:
http://media-2.cacetech.com/video/wireshark/introduction-to-wireshark/
http://media-2.cacetech.com/video/wireshark/custom-shortcuts/
http://media-1.cacetech.com/media/network_mysteries/mysteries_intro/
http://media-1.cacetech.com/media/network_mysteries/missing_download/
http://media-1.cacetech.com/media/network_mysteries/slow_network/
http://www.cacetech.com/media/network_mysteries/slow_dns/
Wireshark Network Analysis :
http://www.wiresharkbook.com/coffee.html