My (Discrete, not Unibody) MBP (2007-ish) just started to kernel panic on boot.
Pulled the HDD, which boots via USB on my Mini - hopefully ruling out a HDD or data/OS issue.
I've disconnected the Airport card as well as removed the memory SO-DIMMs and booted with one at a time. Still kernel panics.
Tried the Apple Hardware Installer/Diagnostic DVD and it froze near the end (logic board testing...)
Wasn't able to get it to boot to try Tech Tool Pro diagnostics.
All signs are pointing to a logic board failure - am I missing anything?