This screencast demonstrates how to get started with Ajax in ASP.NET MVC Framework.

Come see how to build a continuum of client applications including HTML, AJAX, ASP.NET, Microsoft Silverlight, and Windows Presentation Foundation (WPF) that all consume the same Windows Communication Foundation (WCF) service. Learn how to reuse as much code as possible, how to optimize the development process, and how to address key logistical issues like external servers and cross domain communication.

Learn how Microsoft ASP.NET AJAX enables you to easily create and use AJAX Control Toolkit controls in both ASP.NET Web Forms and ASP.NET MVC applications. Learn about all of the new features and improvements to the AJAX Control Toolkit controls such as the new client Script Loader and client DataView control. Also learn how ASP.NET AJAX was designed to work seamlessly with jQuery, how you can create ASP.NET AJAX controls directly from jQuery and how you can use the jQuery library in ASP.NET AJAX code. Learn how the new features …

Learn an easy, unobtrusive way to add AJAX functionality to an existing set of pagination links using jQuery.
http://railscasts.com/episodes/174-pagination-with-ajax

Sam Stephenson, creator of the Prototype library, sat down and recorded himself remotely and talked about what excited him about new Prototype versions, browsers, and the state of Ajax in general.

jQuery is a JavaScript library which allows you to develop solutions with less code, in less time. You can build interactive prototypes for your prospective clients, or take an existing solution and add new dynamic behaviour with little effort. We will see how jQuery can be used to quickly and concisely apply JavaScript behaviour to your web app. It will cover selectors, Ajax, DOM manipulation and more. The aim: to produce lean unobtrusive JavaScript with jQuery.
Watch this video on Oredev.org

In this video, Todd Miranda demonstrates how to add AJAX functionality to an existing ASP.NET page with minimal effort to increase performance and improve the overall user experience of your application.
http://msdn.microsoft.com/en-gb/vstudio/bb821246.aspx

Crawljax is a tool for crawling any AJAX/GWT application. It uses WebDriver to navigate through the different states of a web application. With plugins and invariants Crawljax can be used to perform various automated tests. For example: security testing, regression testing, accessibility testing, performance testing, cross-browser testing…

As a Python web developer you are probably familiar with the paradigms of testing simple web applications. Your test case makes a GET / POST request, your program responds with an HTML page, and your test verifies the HTML elements. Unfortunately, today’s typical web application is not so simple! Since modern browsers support asynchronous JavaScript (Ajax) very well, the HTML response might deliver program code to run on the client’s web browser. The browser’s runtime environment would then interact with your server-side Python program and you now have a big …

This presentation recaps how to use the Ajax.ActionLink and Ajax.BeginForm Ajax Helpers to utilize ASP.NET AJAX in your ASP.NET MVC Web Applications.
http://www.tampadev.org/News/Details/MvcAjaxHelpersScreencast