As Andrei Zmievski points out, the notes from the PHP Developers Meeting have been posted to the php.net wiki.

Taking advantage of php|tek bringing a lot of people together, we had a PHP developers meeting over 2 days before the conference. Day 1 was dedicated to technical issues in PHP 5 and 6, and day 2 was spent discussing potential features, migration issues, current roadblocks, etc.

The notes cover PHP versions 5.3, a possible 5.4 and looks forward to 6.0. There's some interesting stuff in there, so read over it if you get a chance.