For you to be paid, the publisher must earn at least $75 from AdSense. The advertiser must spend at least $20 at AdWords. At this stage the program is only for U.S. based websites.
The rules are strict. For example...
* You're not allowed to "cause any hyperlinks to web pages on the Google web site to create a new browser window".
* You're not allowed to send an email to prospective customers that includes "any reference" to "Google Materials".
* You're not allowed to issue any public statement, for example a press release) in connection with the affiliate agreement and your participation in the referral program without Google's prior written consent.
[google.com...]
Please discuss this program in the Advertising Sales and Affiliate Programs Forum [webmasterworld.com]
Initially posted here:
[webmasterworld.com...]