Chicago - May 24-27 php|tek in Chicago was fun as always. It is the best PHP conference I have ever been to, which makes sense, given that it is focused solely on PHP and surrounding technologies. The best thing about the conference is the community feeling in general. You get a real sense that everyone there really cares about PHP and is heavily invested in it, which is good for moving the whole language and ecosystem forward.
I myself gave two talks - one about Stackbox CMS, a new CMS project I have been working on, and one about Apppcelerator Titanium Mobile since I have been working with it a lot lately. The presentations are embedded below.