A tech* question: How did you implement the fail-over to a different amazon region when one fails? I'm interested in common approaches to this SPOF and what ha

A tech* question: How did you implement the fail-over to a different amazon region when one fails? I'm interested in common approaches to this SPOF and what have been done in this case. *seeing the discussion that is going on around this post, it almost feels off-topic to post a technical question :)