Just as in title. The ebuilds in the tree seem to not have been updated for a long time. 3.0.6 is available since 13 April 2007 , and 3.1 branch since 02 July 2007
The website is dead ATM.
And now it's up again. It sometimes becomes unavailable, but usually gets back to life soon.
In PHP overlay now... http://overlays.gentoo.org/proj/php/browser/portage/dev-php5/phpunit
In CVS now.