Joel, the point of my article was nothing to do with architecture and using multiple AZs. Of course we use a minimum of two AZs and often three in reach region.

Joel, the point of my article was nothing to do with architecture and using multiple AZs. Of course we use a minimum of two AZs and often three in reach region. The problem is that AWS continued to report the entire region as completely healthy in spit of an entire AZ being down, and worse, continuing to route traffic from an ELB in that AZ to that unhealthy AZ data center.