Cloud Commerce System in 10 data centers
You know I get criticised for overbuilding my network and hosting topology through the software layers and this is the reason why I spend so much, so we can deliver the highest SLA's on the market. At Savtira we have 10 data centers which are distributed throughout the USA/EMEA and they are load balanced at the DNS level and go as deep as checking to ensure the SSL is responding correctly before sending consumers to a replicated server. Its self-healing, easy to maintain since you can just take a entry out of DNS to do maintenance on a entire data center and in the event of a problem it has auto-fail-over to the next closest data center... we just sent out our SLA's (I created first ever network/hosting SLA when I founded Savvis)
http://www.savtira.com/press_release.php?n=84