It seems that Disk Warrior is not going forward to support Intel macs. It's pretty disappointing because I was a big fan of this software for the PPC macs. Unlike the Windows world, there are few system diagnostic tools for the mac. Maybe that's because there are fewer issues with incompatible third party hardware. However, sh*t happens and sometimes you need more than Apple's disk utility program to figure it out.
As I mentioned previously, I had some serious issues with kernel panics on my Mac Pro. Coincidentally I had installed a third set of 512MB ram cards just a few days earlier, bringing me to a grand total of 3GB (Aperture is finally feeling a little more peppy). I was concerned that the new chip was the origin of my problems.
Luckily, Apple includes a Hardware Test application on my system install CD. I only had to restart my machine with the "D" key held down. The Mac Pro booted right into a diagnostics program. Ran the extended diagnostics which took about 12 minutes. It tests the RAM, CPU and motherboard. It also provides some info about the machine.
Since it is not possible to do a screen capture from the hardware test, I've added a link to a larger camera shot.