Is the actual talk available somewhere? Much as I like reading a blog post, I'd much rather first watch the actual presentation by Arun Thomas, which was _clearly_ worth watching by far more than just the audience of Systems We Love.
For further edification, the entire 9h Systems We Love live stream is up on youtube at https://www.youtube.com/watch?v=TPe6UXMDMGM or split into videos and via Vimeo at http://systemswe.love/videos