In the past month, eBay sent a letter to Google requesting it to refuse to sell search-related ads that use eBay's trademarked name, including variations and phrases. According to company spokesman Kevin Pursglove, eBay requested the action "so that third-party advertisers do not abuse the intellectual property of the company." [/quote]
From ZDNet, full article here: http://www.zdnet.com.au/newstech/ebusiness/story/0,2000048590,20277011,00.htm