[angersock]

If you don't mind me asking--why isn't there a bus primitive in 0MQ?

We're doing a simulation using it and we've ended up with a bunch of pub/subs instead of a shared bus.

It's not terrible, but is a little weird.

[aktau]

You might be interested in nanomsg (http://nanomsg.org/), the spiritual successor/spinoff of zeromq, by the original creator (the parent you replied to, Martin Sustrik). It features a BUS pattern too.