Hi,
We load balance our big NetTalk Servers.
We have load balanced in AWS. You can use ELB (AWS's built-in load balancer).
We have load balanced with our Fortinet routers.
Under some circumstances you need to do extra stuff in your NetTalk app.
For example, if you want to support both HTTP and HTTPS traffic on your site, but also offload SSL to your load balancer, AND you also need to redirect HTTP requests to the secure part of your site, you need to read the special request headers to work out if you need to redirect to HTTPS or not.
Further John Moore who works for LJ Hooker in Australia has also built a load balancer in NetTalk. They use that in production at the moment.
Regards
Bill