$1,400 a month with AdSense? You're kidding me, right?

I was surfing around looking at blogs and found my way to Desinotes. The writer for the blog, Sunny, seems to have figured out back in late '06 how to make $1,000 to $1,400 per month with AdSense and two blogs.

That seems to be mind boggling to me. I'd like to be making that with just two blogs. Particularly if it was not a bannable offense. This post explains how he managed it and it don't look bannable from the little I read so far. Still have to go back and read it in detail though.