Postmodern PHP: appserver.io, a multithreaded application server for PHP, written in PHP
There’s a lot of very interesting stuff going on in the PHP scene right now, I have the feeling this quite often bashed language gets more and more interesting every day. Today sitepoint.com published an interview  with the guys behind appserver.io, a free and open-source (and hopefully also with excellent paid hosting services) multithreaded server, ironically written in PHP itself !
Yes, full and parallel usage of all cores (and threads on hyperthreaded CPUs)!
No need to install Apache, NGINX or similar. And this seems to be really fast!
I guess this will become a very important project … More updates on that soon.
TechDivision has published a installation guideline for Debian Wheezy on the GitHub page 
TechDivision has published a roadmap with planned and upcoming features 
Interesting one-minute-clip, showing the awesome one-packed-file (.phar) drag and drop deployment of apps on “appserver” 
Basic setup slides: