Hi Rick, Thanks for your comments. More details inline on each point, but I think in general what you are advocating is a higher level service akin to an RPC type mechanism. I agree this would be useful and in previous discussions on this we decided this should be something we layer on top of the request/reply capability we are defining here. What you propose is indeed one way to use request/reply but there will be others and we want to (a) keep the base capabilities very generic to support multiple types of these uses and (b) keep the base request/reply simple enough to define quickly in order to unlock potentially multiple parallel uses of it. Shawn