I've just been modifying an existing Coding Standards document at work and found some good links to other example documents:

1. MSDN
   
2. Philips Medical Systems
3. Iridium
4. Lance Hunt

I really don't like the idea of having a huge document to maintain. I like the idea of using FXCop to create rules and from the rules created in XML somehow generate a report that is readable upfront for the programmers. They can them run FXCop on their code to see where they are doign things wrong.