I have implemented it. It works well. You don't have to be the smartest person in the world to not screw up elementary programming problems. Mibbit handles a few million users without issue on a few VPSes.

Erlang "doing it for me" isn't going to be anywhere near as efficient as me doing it myself.

I'm probably not the smartest person in the world, but I'm certainly smart enough to write a comet/web server that's fast enough.

I guess I'm not going to convince anyone here shrug. If you believe Erlang is a magic bullet great for you.