Over on our sister site, AjaxDeveloper.org today, there's a new post from Ajax Magazine (from the PHP Magazine folks) about the most popular pairing with Ajax - no big surprise that it's PHP!
After about 6 month of running this AJAX Blog I was wondering which couple is the most requested on the net. Not because this website is mainly about PHP related technologies because I was trying to cover all usage of AJAX with Ruby,python,.NET, J2EE ... but AJAX PHP was the most requested couple overall! surprising!
They also note that while there is a popularity of PHP in the minds of Ajax developers, there also aren't any commerical apps written in it yet - partially because of the opinions that corporate professionals have of PHP...