Over on MacSlash.org I saw an article saying people were not allowed to use the word mac with google adwords. This is prolly due to the fact that Estée Lauder has a trademark on the word mac. They have a product line called M•A•C.
The silly part is if you google the word mac, the ads you get are for cosmetics, but the search results are entirely for Macintosh stuff. This must piss off Estée Lauder tremendously.
The funny part is a paid ad (above the search results) for the iPod. Paid for by Apple itself. It seems Apple can publish ads under the mac adword because is also has a trademark for the word mac.