I recently found an ad for NoGold.org on the main Blizzard site and immediately joined. The site offers a list of active gold sellers for Webmasters to use with Adsense to filter gold sellers from their sites. I quickly updated mine. Google's filtering mechanism doesn't allow for wildcards which can make it difficult due to the large number of sites and possible URLs. Hopefully this can raise awareness and put some pressure on the business that continues to plague the gaming industry.