PHP5: where to go with PHP5 betatesting feedback?

Checking the Subject's here, PHP5 activity seems to be very low. So, I assume there is a dedicated place somewhere else for PHP5 beta testing. But where, please? (I haven't found any clues either in the README* files along the sources, or by a 1-minute scanning of php.net.) (Also strange, that the php.announce newsgroup has mails from 1999, but only up to last December. Does that mean the NG is synchronized only once a year from some posting spool? ;-) ) Thanks, Sz.