First place I noticed it was "New" Twitter. This article was posted on HN a little while after Gawker changed their design which explains why it was implemented

First place I noticed it was "New" Twitter. This article was posted on HN a little while after Gawker changed their design which explains why it was implemented and why it shouldn't have to begin with: http://isolani.co.uk/blog/javascript/BreakingTheWebWithHashBangs/ http://isolani.co.uk/blog/javascript/BreakingTheWebWithHashB... And it's discussion: http://news.ycombinator.com/item?id=2196160 http://news.ycombinator.com/item?id=2196160