that is a fascinating article, thank you. i like the idea of 'push karma'.

You're welcome! I really liked the 'push karma' too.

I liked this idea too : "all engineers who contributed code must be available online during the push. The release system verifies this by contacting them automatically using a system of IRC bots; if an engineer is unavailable (at least for daily pushes), his or her commit will be reverted."

That way, they are be able to react very quickly in case of a problem.

But this isn't a magic bullet...a commit can't always be reverted without conflicts, and even if reverted there's no guarantee that it leaves the codebase in a correct state. (Guess I should read the article you're talking about.)