[darkarmani]

Does anyone understand the point they are making in #9 about VPC?

Are they suggesting using HAProxy in your public subnet and ELBs in your private subnets? Is this their reference to avoiding using a NAT box (actually PAT)? Don't you still need a HAProxy box in each of your AZs?

[falcolas]

I'm not sure, but I read it as ELB over your HAProxy instances (for high availability), and use HAProxy to do the intelligent load balancing (which would solve the "sticky" argument put forth by the author).