AJAX Resources
Below is a list of random AJAX resources from around the web.

AJAX Patterns
Here is a site dedicated to AJAX programming in the form of a Wiki.  Looks like it has the potential to become a very in-depth site.

Handling Bookmarks and Back Button
This article descripts how to use the Really Simple History Framework to handle bookmarks and using the browsers back button in your AJAX applications.

AJAX Projects
Here is a new site that is getting started.  The author Hazem Torab is collecting AJAX resources and tutorials from around the web and adding them to the site.  Could become a great AJAX resource.

AJAX Matters
Here is a pretty extensive list of AJAX sites, frameworks, articles and just general links to AJAX programming information.  If you just want to explore the world of AJAX this is a good place to start.

AJAX Freaks
Here is a site that I ran across that is a typical developer style site dedicated to AJAX.  They have articles, tutorials, and forums.  Could grow to a large community.

Yahoo! UI Library
Yahoo has released a set of DHTML / DOM / AJAX components for use in your websites.  Licensed under the BSD