Here’s a good tutorial on implementing Ajax in WordPress themes.

You can’t release that project into the wild until you give people a slick, colorful loading indicator to know that they are waiting for something to happen. Coding something from scratch is most certainly beneath you, so you need this progress indicator from AjaxLoad.info. It’s is a two-step process that takes about 20 seconds: choose from one of about 40 styles of indicators, and designate a background and foreground color. Hit ‘generate’, then if you like it hit ‘download’. It’s quicker than the time it took me to explain it. It will get you back working on your next big assignment that much sooner.

Over at net.tutsplus.com David Walsh has a long article comprised of fifteen highly-detailed tips for optimizing your MooTools JavaScript framework code.

Wired has a feature article with the man who coined the term “AJAX”,
Jesse James Garrett, where he suggests that  AIR will be another boost for web apps.  It really great to see the HTML/CSS/JS crowd embracing the AIR plaform just as it’s great to see Adobe embracing the same community.

O’Reilly’s ONLamp.com site has the first part in a new series documenting The Power of Google Gears. Part one outlines the database portion of the Google Gears API while future tutorials will show you how to use the WorkerPool and LocalServer API’s.

MiniAjax.com has a showroom of nice looking simple downloadable DHTML and AJAX scripts that can add some zip and spice to your websites. The scripts have all been created and hosted by other authors, but this is a nice place to start to browse some of the most popular scripts of the past year or so.

Prototype 1.5: The Complete Documentation has just been released. This 166 page pdf e-book was written by Sam Stephenson and the Prototype team so should be an authoritative source of docs.

Mootools is a small object-oriented JavaScript library that is crossbrowser compatible and easy to use. Some features include DOM effects, Ajax, DOM Navigator, drag and drop, sortable lists, cookies management and much more. The framework also makes it easy to extend HTML elements with your own methods, to help make your coding style way cooler.

One of the nicer features is the way you download mootools. You choose the features you want to use, and mootools packages a custom JS file that includes all dependencies. This makes mootools very small and efficient!

Jack Slocum offers some 3 Easy Steps to Avoid JavaScript Memory Leaks. This article offers three great tips and an overview of using Leak Monitor to detect places where your JavaScript may be leaking.

Here is a nice two part interview with Alex Russell who is the creator of the Dojo AJAX toolkit. In Part I, Alex discusses the history and strengths and weaknesses of Dojo. Part II looks at AJAX challenges as well as competition to the Dojo toolkit.