Google has recently released a set of new guidelines for the AdSense API. The new rules will go into effect tomorrow, September 13th, 2007. Something key to note is that this new rule applies to all future applicants, not current AdSense API users.
The primary topic here is that the minimum required traffic has been increased to 100,000 pageviews per day, before even applying. I’m getting to the point where I may need to apply for the AdSense API usage, but we’ll see how it goes, I’m still getting there.