chiefie: not to be biased... i haven't had any BSOD for years... and if I do, I know what is causing it... (me with wrong drivers usually! LOL)
and when I used to work on Mac... i get beachball just about every day and it is a well maintained Mac too....
The other point I was trying to make was:
Beachball - application not responding/loading (also not at a responsive state yet).... it isn't to the same degree as a BSOD.
Kernal Panic - Gray window that instructs you to hold down the power button and turn the computer back on - this is more or less the Mac version of BSOD. These are rare - usually caused by bad drivers or hardware faults.
A better comparsion of the beachball is the 'Program not responding' window in window or 'End Task'.

