Nice article, and an interesting combination of technologies! Maybe it's a little bit off topic, but I had a look at http://streethoarding.com/ to see the thing in action. I like the idea and execution (it runs pretty fast; very very simple design; would be interesting to see how well it runs with a huge amount of visitors) and as curious as I am (especially regarding security), the first thing I entered was some JavaScript code. Guess what, no input sanitation :)