[todd3834]

If you are interested in how something like this was made, there was a good talk about building something like this at RailsConf this year: http://youtu.be/Q4ttqkIEM7g

[fotinakis]

It's an awesome talk! Jessica Dillion has actually helped me with Percy a bit. :) She's great, you can see her slides here: http://www.slideshare.net/jessicardillon/implementing-a-visu...