OK, I've counted twice now. Both times, the number of Macs here at the conference has edged out normal PC's by at least 25% margin. I've counted at previous conferences, and while Macs have made a strong showing, they've never passed the tipping point yet. At this conference, they did. While the world's end users may mostly be running Winders still, I find more and more developers are finding ways to do their development on Macs. It will be interesting to see how things look at OOPSLA this year.