said by DreamCarr 
:If I read you right, you employer makes pci cards of some sort?
If so, get one of your engineers to whip up a custom pci breadboard that outputs 12v, and has a rpm sensor. Then just write your own custom softs to manage notification to the pci bus. Hell build a make-your-eardrums-bleed piezo buzzer onto it too, for good measure!
Do it right, and you've got yourself a new product that a lot of datacenters and enthusiasts will love you for.
I'll pass on the suggestion. Always looking for a good revenue stream. 
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