Why is 0MQ not appropriate at "Internet scales" (and I presume "should" be relegated to LANs)?
Perhaps I don't fully grok what you mean by "Internet scale" (WAN?).
I ask because (1) it looks great for a general transport at any "scale" and (2) the article itself
discusses a scenario in which 0MQ could be used over a WAN (branch offices, the forwarder, etc.).