Hi Conor,

I shall disagree that a "TRUE REDUNDANT cloud will be in multiple data centers". this is only an option. Operating equipment in one infrastructure in different data centers is CDN, something businesses did year before the concept of Cloud computing to appear.

If you use global redundant network for Cloud Hosting service, you do not need to have infrastructure in different physical locations, unless you really need some kind of localization similar to Google local search. If you are service provider, you do not need this.