PHP & AJAX Presentation Online

the.admin.man writes "There's been quite a bit of buzz around using PHP as a backend to AJAX-based web applications (the same development methodology on which some Google applications), lately, particularly after the release of JPSpan, a framework that helps building XML-based interfaces between Javascript and PHP apps. Just yesterday, Joshua Eichorn gave a presentation to the Arizona PHP Group on developing AJAX applications for PHP--he's posted the slides online, and will give his presentation again through a free webcast hosted by php|architect."