Here is a list of free top paying keywords for google adsense. Rates given here is the average for top three postion, updated 19th May, 2007. The high paying keywords provided here is just for keyword research and analysis purpose. We are not affiliated with google or google adsense in anyway.
Please note that the rates given are what publishers pay google for top spots on google search results page. Rates for partner sites will be much lesser. Also google takes a good cut before passing it to the publisher. However the rates are true indicators for the earning potential for any niche.
I hope the information will be useful for webmasters doing keyword research for adsense and adwords. I have tried to include all possible high paying niches. This data can be used to create a MFA spam site 
or as basic info for something useful! Enjoy the list of highest paying keywords!
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TOP PAYING KEYWORDS – LEGAL
$66.89 austin dwi
$58.30 austin dwi attorney
$54.56 san diego dui attorney
$47.44 houston criminal attorney
$42.83 san diego dui
$40.89 dwi texas
$40.19 dui attorneys
$39.90 dwi attorney
$39.11 dui attorney
$38.49 dui lawyer
$37.57 dui lawyers
$35.80 federal criminal attorney
$35.67 car accident lawyer
$35.32 dwi attorneys
$34.19 criminal lawyers
$33.95 new york criminal attorney
$33.19 auto accident attorney
$33.13 auto accident lawyer
$32.31 dwi lawyer
$31.02 texas dwi law
$30.16 car accident attorney
$29.56 california tax attorney
$29.37 dwi in minnesota
$28.93 motorcycle accident attorney
$28.38 washington dui
$28.25 lemon law attorney
$27.95 lemon law
$27.92 help attorney
$27.88 injury lawyers
$27.68 dallas dwi
$27.25 wrongful death attorney
$27.20 mesothelioma attorney
$26.72 personal injury lawyer
$26.58 san diego personal injury attorney
$26.55 accident lawyer
$26.32 personal injury attorney
$25.83 tax attorney
$25.77 alaska lawyer
$25.75 minnesota dwi laws
$25.72 federal lawyer
$25.58 dallas personal injury attorney
$25.16 lawyer injury $25.16
$25.11 death lawyer $25.11
$24.65 mesothelioma lawyer
$24.06 birth injury lawyer
$23.90 los angeles lawyer
$23.60 securities fraud lawyer
$23.50 estate planning lawyer
$23.33 california criminal attorney
$23.22 san jose lawyer
$22.61 dwi minnesota
$22.27 criminal attorney
$22.27 criminal attorney
$22.19 collections attorney
$22.15 phoenix dui
$21.80 colorado dui laws
$21.79 oklahoma dui
$21.72 tampa dui
$21.61 attorney com
$21.27 massachusetts dui
$21.09 lawyer atlanta
$20.83 texas dwi laws
$20.60 lawyer criminal
$20.56 illinois dui
$20.56 criminal defense attorney
$20.46 defense attorney
$20.46 defense attorney