So, does this mean that PHP has officially forked?  I mean who is going to want to keep writing in the interpreted version as opposed to the hiphop-able version?  How many changes are there?  I've only seen mentions of ditching eval, but there is probably more. Will people be debugging their code in both vanilla PHP and HPHP?<p>How well does this support other projects, like wordpress (for example)?<p>Another issue this raises is who is now in control of PHP?  Not in legal terms, but in terms of mindshare. It's one this for a student to write a PHP translator, but quite another for Facebook to do it. I'll be interested to see how Zend responds to this. At least when Google started unladen swallow, they had Guido working for them.