ASP.NET AJAX (Formerly "Atlas")

Building a Mashup of National Parks using the Atlas Virtual Earth Map control: A tutorial on the WebLog of Jonathan Hawkins (ASP.NET Atlas PM Architect).

Video Tutorials

http://www.asp.net/learn/videos/default.aspx?tabid=63#ajax

Video tutorials: “'How Do I?' with ASP.NET AJAX," video series by Joe Stagner from the Microsoft product team. ASP.NET AJAX Videos include:

How Do I: Get Started with ASP.NET AJAX?
How Do I: Get Started with the ASP.NET AJAX Control Toolkit?
How Do I: Use the ASP.NET AJAX CascadingDropDown Control Extender?
How Do I: Implement Dynamic Partial-Page Updates with ASP.NET AJAX?
How Do I: Make Client-Side Network Callbacks with ASP.NET AJAX?
How Do I: Write a Custom ASP.NET AJAX Control Extender?
How Do I: Add ASP.NET AJAX Features to an Existing Web Application?
How Do I: ASP.NET AJAX Enable an Existing Web Service?
How Do I: Use the ASP.NET AJAX TextBoxWatermark Control Extender?
How Do I: Use the ASP.NET AJAX Popup Control Extender?
How Do I: Use the ASP.NET AJAX ModalPopup Extender Control?
How Do I: Use the ASP.NET AJAX AlwaysVisible Control Extender?
How Do I: Use the ASP.NET AJAX Accordion Control?
How Do I: Use the ASP.NET AJAX Client Library Controls?
How Do I: Use the ASP.NET AJAX Collapsable Panel Extender?
How Do I: Use the ASP.NET AJAX Draggable Panel Extender?
How Do I: Build a Mashup using Microsoft ASP.NET AJAX?
How Do I: Use the ASP.NET AJAX DynamicPopulate Extender?
How Do I: Use the ASP.NET AJAX FilteredTextbox Extender?
How Do I: Use the ASP.NET AJAX HoverMenu Extender?
How Do I: Use the ASP.NET AJAX ToggleButton Extender?
How Do I: Use an ASP.NET AJAX ScriptManagerProxy?
How Do I: Use the ASP.NET AJAX DropShadow Extender?
How Do I: Use the ASP.NET AJAX PasswordStrength Extender?
How Do I: Use the ASP.NET AJAX RoundedCorners Extender?

ASP.NET AJAX Tutorials

http://ajax.asp.net/docs/tutorials/CreateSimpleAJAXApplication.aspx

Tutorials: Series of ASP.NET AJAX tutorials including:

Sample ASP.NET AJAX Application
ASP.NET AJAX and JavaScript
The UpdatePanel Control
The UpdateProgress Control
The Timer Control
ASP.NET Application Services
Web Services
ASP.NET AJAX Extensibility

ASP.NET AJAX Roadmap

http://atlas.asp.net/quickstart/default.aspx

The "ASP.NET AJAX Roadmap," provides is a guide to help you get started with ASP.NET Ajax. Topics include getting started, ASP.NET AJAX server controls, client scripting, debugging and tracing, Web Services, localization and globalization, and extending ASP.NET AJAX. Includes links to additional documentation, tutorials, references and more.

ASP.NET AJAX

http://ajax.asp.net/

Atlas is an ASP.NET technology from Microsoft that allows you to develop Web applications that update data on a page by making calls to a web server. Site includes downloads, video tutorials (ASP.NET AJAX: A demonstration of ASP.NET AJAX; ASP.NET AJAX Extensions: Installation and setup; ASP.NET AJAX Control Toolkit: Installation and getting started; and more) documentation, blogs and more.