Some details not in the official announcement:<p>Currently works off of the PHP 5.2 language specs<p>Compiles to a stand-alone libevent-driven web server or CLI executable<p>Not based on Zend's runtime/code<p>Currently no windows support<p>Intended for 'drop in' PHP replacement - if it runs on PHP and doesn't use a few things like eval() it will compile with HipHop