Affiliate programs are one of the most successful methods to drive sales for a Web site. So why not? Why can't Google start an affiliate program for its AdWords and AdSense programs?
Google joined the affiliate bandwagon, with the announcement of a new Google Referral Program. Basically for every AdWords advertiser and every AdSense publisher you refer to them AND "Advertisers qualify as completed referrals after they spend $20 with AdWords. Publishers qualify after they earn $75 in AdSense revenue." you make $20. To bad its not a percentage of the spend or clicks. :)
Now, which SEO will outrank Google for "AdWords" and "AdSense" in its own engine? :)
Currently, forum coverage at Search Engine Watch.