I have been fortunate to have been "accredited" for a couple of professional events, even though I am not in the remotest way a pro photographer. In both instances Canon had an area set-up to provide assistance for the CPS members and accredited photographers.
Here is the information from the Canon Professional Services (CPS) website .... Sounds like they have the Olympics covered, as does Nikon.
CPS in the Main Press Center
Canon Professional Services (CPS) will be conveniently located inside the Main Press Center in the Canada Place/Vancouver Convention Center and at the Main Press Center in the Whistler Conference Center. CPS Repair and Loan Services Available
Canon Professional Services will have international staff on-hand to assist accredited photographers with their Canon camera service needs. Clean and check service, and routine repairs for Canon cameras, will be handled by our technicians on a complimentary basis with a targeted turn-around time of 12 hours.
*Note: Only clean and check services will be available at the Whistler Media Center. Any product requiring additional service will be sent to Vancouver. 12-hr. service does not apply in these cases. For expedited repairs, photographers are encouraged to bring equipment to the Vancouver facility.
Registration
Beginning at 9 a.m. on February 10th accredited photographers are encouraged to visit the CPS Center to register for Canon repair and loan services.
Canon Reception
On Thursday, February 11th (7:00-10:00 p.m.), Canon and Nikon will host an opening reception at The Vancouver Aquarium. Please join us for refreshments and entertainment. (Space may be limited).