Douglas Crockford's discussion of Javascript

http://www.yuitheater.com

Douglas Crockford — The JavaScript Programming Language
Douglas Crockford — An Inconvenient API: The Theory of the DOM
Douglas Crockford — Advanced JavaScript

jQuery for Absolute Beginners Video Series

http://blog.themeforest.net/tutorials/jquery-for-absolute-beginners-video-series/

Rob Bagby's Webcast Sessions on ASP.NET AJAX Client Libraries

http://blogs.msdn.com/bags/archive/2007/06/07/latest-asp-net-client-libraries-webcast-sample-code-and-links-to-all-sessions.aspx