Articles
Introduction to Ajax : Adaptivepath
An Introduction to AJAX by David Teare
Realtime Form Validation Using Ajax by Greg Murray
Performance Impacts of AJAX Development
Study of Ajax Performance Issues
Ajax Performance Analyis : IBM
Java Object Serialization for Ajax
Tutorials
Ajax Patterns : Softwareas.com
Video Tutorials
System Requirments - SrikantDhondi
Getting to Know Ajax - Srikantdhondi
Modifying Web Pages on Fly - SrikantDhondi
References
23+ Impressive Tools for Faster JavaScript & Ajax
Google Web Toolkit for Faster AJAX
Blogs & Discussion Groups
Ajax User Group : JavaScript Official Group
Downloads
Books
Build Your Own Ajax Web Applications
Bulletproof Ajax - Jeremy Keith