Like Kaj, I've decided 0MQ is a better way to go at this point.
Taking on this, I'm a bit fan on the BEEP protocol building framework. It offers some higher level features thatn 0MQ.
I always thought it's a very cool (maybe even a killer feature) to build such an application protocol framework right into R3. So, when you want to do P2P, Client/Server etc. and use R3 on both ends, you just use this BEEP stuff and all networking problems are gone.