Dtrace : Advanced doc
According to Bryan Cantrill, it seems that people are reaching the limits of the Dtrace Admin Guide. That is why he and his two Dtrace buddies made a new presentation called Dtrace : tips, tricks & gotchas…
So if you finished finding the Dtrace Administration Guide useful, you may want to go their next presentation slides (warning : yes these are slides so don’t expect a nice format full of nice explanations).