Google Throws Open Doors to Its Top-Secret Data Center | Wired Enterprise | Wired.com.

There is something about seeing physical data-centres that reminds us (and by us I mean those of us who think about cloud) that there is a physicality to this cloud… it is materially present if hidden from view.

If you are more interested in this physicality of the cloud read Andrew Blum’s excellent introduction “Tubes” – http://www.amazon.co.uk/Tubes-Behind-Scenes-at-Internet/dp/0670918989