I am using VVV for my local WordPress development. Recently found new tool called 'Variable VVV'. It has lot of useful commands like list, create, delete WP sites. Today i found one useful tool called 'WP Engine's Mercury vagrant environment', which installs HHVM with PHP-FPM Fallback. This is created and used by WP Engine. If we can have similar implementation in CentMinMod, that will be excellent.