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Hello, 1. DONT PANIC! 2. Why not all of the above? As you've mentioned no-follow means no worries but if you are worried and want to sleep better you can add them to the disavow tool. You can also work on getting the links removed from the website so it won't show up in tools like open site explorer etc. as for other action you could try to work out WHY but good luck with that. Over time it happens to sites so don't sweat it too much it won't hurt any rankings most search engines respect no-follow so deal with it in a way that will make you feel better. Hope that helps and good luck

Linda, No just some alternatives that are like or better than Google Knols. A list of possible solutions that might be good to look at that people have used before with some success.