http://angle45media.files.wordpress.com/2008/05/google_docs.pdf Just had a quick look and pages 32 onwards has some good criteria of how to get a Google Slap. Not sure if the document is real however, interesting points and insight if it is
Ok I know this is more related to SEO than AdWords and both of Googles algorithms are different and individual however, they both work from a simular mission and reading many of the comments posted by DP members within this section of the forum some Google Slapping is a result of some areas highlighted in this document. One of the final points asks you to take away 2nd hand info (wiki, original site etc) advertising and links. After this is whats left of value in relation to the keyword?