Anyone interested in paid search or click fraud should take the time to read the Tuzhilin Report (pdf) which is a 47-page document written by an independant party to a recent court case concerning click fraud.

It's a complete overview of paid search and an extensive report on the conceptual problem of click fraud and the steps Google takes to combat it. The author had insider-access at Google and covers the topic with a depth that Google themselves generally doesn't.

I'm sure there will be in-depth analysis of this report over the next few days, I'll update this post with links of the best posts I come across.

Bonus Link: A CYA post from Google regarding CEO Eric Schmidt's 'it's a self correcting problem' clickfraud comment. For another view, some snarky but true thoughts from Mark Cuban.