AJAX

Asynchronous JavaScript and XML - It's Ajax and it's everywhere. Start at the ASP.NET Ajax site and work from there...there's a ton of resources at your disposal.

• Ajax Showcase - Check out some of the great sites that been built using Ajax.
• Ajax Documentation - There is a great deal of documentation.  You'll find it available offline and online.  Be sure to scroll down and take a look of the videos. 
• Jesse James Garrett’s original essay on Ajax - The one that started it all.
• Beta: Ajax History Training - An excellent three-part series on the new History feature of the ASP.NET 3.5 Extensions.
• ASP.NET AJAX - Under the Hood Secrets - by Omar Al Zabir, an excellent article showing behind-the-scenes details of ASP.NET AJAX and some great performance tips!

Videos -

There's an entire section at http://www.asp.net/learn/ajax-videos/ filled with over 60 AJAX Videos, including, but certainly not limited to these great beginner tutotrials:

• Get Started with ASP.NET AJAX - Take your first steps toward learning Microsoft ASP.NET AJAX, from downloading and installing the framework to creating your first AJAX-style application.
• Get Started with the ASP.NET AJAX Control Toolkit - Learn how to extend your ASP.NET AJAX applications using the ASP.NET AJAX Control Toolkit. This video starts with the very basics.
• Joe Stagner on ASP.NET AJAX Part 1 of 2 and Joe Stagner on ASP.NET AJAX Part 2 of 2

Podcasts

• ASP.NET Podcast Show #1 - Introduction to Ajax
• Mix07 Buzzcast #1 - ASP.NET AJAX with Brad Abrams
• The ServerSide Podcast- Patterns for Ajax Developement with Brad Abrams (Part 1, Part 2)

Webcasts

• Advanced ASP.NET AJAX
• This session deals some of the advanced topis in ASP.NET AJAX including web service call backs, predictive fetch patterns, paging pattern etc., and deals with some of the internals of ASP.NET AJAX including the Update Panel internals.
• AJAX Enabling your ASP.NET 2.0 Applications Tips and Tricks
• This session helps you understand how you can AJAX enable your existing ASP.NET 2.0 Applications. It details the various steps involved in getting your ASP.NET 2.0 Application AJAX enabled and provides tips and tricks on getting started quickly with ASP.NET AJAX.

Enjoy! Be sure to check out the sub-pages beneath this page!