Using the Word "adwords"? How strict is G with the Trademark?

Hi,

does anybody know how strict Google handles their Trademark on "adwords"?. I mean if I would want to offer a website with resources on Google Adwords and call it for example www.adwords-resources or similar? I know that some companies are really ugly about anybody even mentioning their Trademark-protected words. Does anybody have any experience or know any official G guidelines? When you type in Google "adwords" , you see that there are companies with the Google protected Trademark in their domain name, so I guess it is o.k. as long as it is obvious that the sites are not from Google?

Thanks
Ben.