The newest Zend Weekly Summary spotlights the new CVS system in place (the Web CVS tool from the Horde suite) and some bug issues with IMAP, XML-RPC, and some tips on making your scripts safer.
And, for those that needed that oh-so-crucial reference for PHP-GTK, the wait is over. They have created the Official PHP-GTK documentation that will be expanded upon as the development progresses.