ASP.NET AJAX eLearning Resource

Microsoft released training clinic for ASP.NET AJAX, Learn how to develop highly responsive web applications and upgrade your existing asp.net application with ASP.NET AJAX, check it out here

MOSS AJAX enabled Webparts

During one of our MOSS 2007 POC for our client , we implemented AJAX enabled weparts based on Daniel Larson's ASP.NET AJAX Extensions Toolkit for SharePoint and his blog is a good starting point for Implementing Ajax Based Webparts for Sharepoint(MOSS 2007).