I just submitted mine here...
http://www-odi.nhtsa.dot.gov/ivoq/
Don't know what the result might be, but perhaps the best outcome is a full recall on DRC. I understand that RS4s are suffering the same or similar issues with their Mk II DRC systems. They should be encouraged to submit, too.
I also learned this morning that the dealer ate the cost of my DRC repair (entire system was replaced) as the claim was rejected under the CPO. They also ate the cost of another DRC repair, as they had told the both of us that it was covered.
AudiNA isn't making any friends.
CW