You always find the most interesting things while looking for something else…
I just ran across an interesting white paper from Microsoft on Shredded Storage in SharePoint 2013. What made it really interesting is that is has a nice history of file storage in SharePoint, starting with the Web Storage System in SharePoint 2001 through Shredded Storage in 2013.
Overview of Shredded Storage in SharePoint 2013
Download it here: http://www.microsoft.com/en-us/download/details.aspx?id=39719