I wrote a piece on them last year which also had some good discussions on it on they HN page: http://news.ycombinator.com/item?id=253569 http://news.ycombinato

I wrote a piece on them last year which also had some good discussions on it on they HN page: http://news.ycombinator.com/item?id=253569 http://news.ycombinator.com/item?id=253569