tangor - 10:26 am on Apr 5, 2011 (gmt 0)
Might be difficult. Google allows trademarks in Adwords these days [searchengineland.com...] and filing a DCMA doesn't seem to fit. Could a domain name be considered a trademark? Just asking. I don't know.
As always, in legal issues, we are NOT lawyers and can't give advice. If this is a real problem I can recommend you contact an attorney for any remedies available.