The following lists of high paying niches is a product of 3-month research and monitoring. The data changes every month but the difference is very slight. The error margin for the CPC range is plus/minus $1.57. I want to clarify that this is not a lists of high paying keywords. The following are not high paying keywords. They are high paying niches so don’t expect high CPC if you use the following phrases as keywords and received low CPC.
http://myseoblog.net/2008/08/21/list...dwordsadsense/