Here's mine. On Google, there are several keywords which are copyrighted and you can't advertise on. Here's a trick to use in certain instances. If the word you want to use is 2 words, for example the real estate company coldwell banker, reverse the order of their name, and purchase that as a keyword - as they haven't copyrighted 'banker coldwell', only 'coldwell banker'..the google ppc engine will read your keywords both ways, and that way you can show up. Keeping your ad above .05% is the tought part though.(I will say this - I have several of these types of campaigns and they contribute a good 20% of all my PPC revenue..)
I know, I know, I spend way too much time playing with these..