This past Thursday, I attended the DC PHP Conference. Since I was only there for a day, I'm sure I missed a lot, but I did manage to do some of the things on my list.
Talks hhe mentions were Mike Naberezny's look at Getting Started with the Zend Framework and Eli White's High Volume PHP & MySQL Scaling Techniques talk. He also mentions meeting David Recordon from VeriSign and some work that Damien Seguy on tracking statistics on open phpinfo pages (about half still have register globals on!).