So I'm back from OSCMS 2007, and it was a blast. I'll provide a more complete (and illustrated) writeup later, but for now suffice to say that Drupal developers are by and large totally cool people on top of being very smart cookies.
A lot of people have been blogging about PHP 5, too, and how Drupal needs to move to it or keep PHP 4 compatibility or whatever. One of the most important things to come out of this Drupalcon, as far as I'm concerned, is that I think we really do have a picture of how we can make it happen.