This is a decent list of "where to go" items and "which programs can do what" on the web.
http://www.philb.com/iwantto.htm

A 37-page article giving an overview of AJAX. My only complaint is that they should have checked their grammar before publishing it on the web. Otherwise, it's an interesting article.
http://dhtmlnirvana.com/ajax/ajax_tutorial/

A FireFox extension that helps SEO assessment...
http://www.webmasterbrain.com/seo-tools/firefox-extensions/seo-links/