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.