Michael Girouard has a new post (complete with slides about the PHP and Ajax presentation he gave at a recent New York PHP user group meeting, "Ajax for PHP Developers".
It felt a little strange presenting a JavaScript topic to a bunch of PHP developers, but I made it come back to PHP by demonstrating a the latest Panda PHP package which is only in incubation at the moment.
You can check out the slides on Slideshare and download the code from his site.