Iñaki, > Just for giving some ideas (I come from SIP world in which > failovier/load-balaincing is a core requeriment)... Excellent design. It'll work nicely over a LRU queue[1] and solves the problem of worker failures. I'll make a worked example for the Guide, it'll take me a couple of days. - Pieter Hintjens iMatix - www.imatix.com