We did some tests on it, but found it a very poor fit for a site dependent on huge amount of data which much be "present" to the basically the whole system all the time and up-to-date. In other words, we found it didn't match a site based on MySQL slaves replicating here and there, and with memcached needing to be spot-on. Under some circumstances we'd consider shuffling some image rendering and delivery tasks to it, but that's about it. Tim LibraryThing