highly-scalable - now:maybe, year ago:no multicast - are there still stupid limits on max number of subscriptions? real-time - sort of. have you measured the

highly-scalable - now:maybe, year ago:no multicast - are there still stupid limits on max number of subscriptions? real-time - sort of. have you measured the latency? depends what you mean by realtime. distributed message passing system - distributed:yes, message passing:it depends what you mean. is polling considered as messaging? archiving - what? deletions - doesn't remove the items from search. I consider it as not-working. dynamic subscription changes - yes. access restrictions - sort of. open API - yes ...