I wrote a blog post for SeatGeek's Dev blog about my recent work automating image cropping with OpenCV. We use this to generate images for our iPhone app, upcoming iPad app, and throughout our site.
It reached top 10 on Hacker News and was generating 20% of the traffic to our site for a period of time after it was submitted. Given it's success I'm working on a post regarding recent changes I've made to our deploy process as well.