Ask HN: Anyone using ZeroMQ in production? Experience?

A few times I've toyed with 0MQ but stopped there. I had one use case that was promising but was running into reconnection problems for transient clients. I have another project that I think might be a good fit, but I'm concern about cases that might come up in production that I'm not familiar with.

I'm interested to hear from people that have or are using it in production and how it's was. What communication patterns did you use and did you have any issues you had to work around (like queue disconnects - Paranoid Pirate Pattern vs Simple Pirate Pattern)?