IamA digital camera and lens repair technician AMA!
I've worked in the camera repair industry for a little over 10 years. I currently repair Canon, Nikon, Pentax and Sigma products. I have also repaired Hasselblad, Ricoh, Tamron, Sony, Olympus and probably some others I'm not thinking of at the moment.
I'll answer as many of your questions as I can. Anything from the mechanics to specific problems to industry questions as well.
My Proof: http://imgur.com/wYUIrai
I'll do my best to keep up with your questions. I may be able to answer more tomorrow as well (New Years Day).
Edit: Added Hasselblad. Questions about insurance, warranties, repair tools, manufacturers, industry standards, adjustments... Anything camera, lens or video camera related.
Edit 2: Thank you all so much. I had so much fun with this. Thanks for making me feel awesome and I'll keep answering your questions. I think I got everyone, but I'm sure I missed a few. Keep 'em coming!