mark_roach - 10:38 am on Apr 5, 2011 (gmt 0)
Same thing has just happened to me:
If you are in the US and you have your domain name trademarked I think you have a chance of getting the ad removed.
I filled in the form here [adwords.google.com].
It is worth seeing whether the ad breaches any adwords guidelines and adding details of those to the report. My competitor made an (unsubstantiated) claim about being voted the best site in the uk in his ad copy. So he might get dinged for that even if he gets away with using my domain name.