Xinc (Xinc Is Not CruiseControl) is a free open source continuous integration tool written in PHP 5. It currently supports Subversion and Phing but is extensible to work with any version control or build tool. Xinc is released under an LGPL license. [...] The release candidate contains an updated basic web reporting component. This can be utilized simply by copying web/index.php to a web accessible location.
Their goal is to have a release of the stable 1.0 version in about three weeks and have frozen the code base in preparation. Most of the work left to be done involves the setup of a PEAR channel (to make installation a snap) and fleshing out the documentation to make things easier for developers just coming in and checking it out.