I'd like to add support for Amazon's SQS.

I found a previous thread discussing this, which stated that Rhino
assumed "local reliable queues". I also noticed some notes in the
documentation about different instances subscribing to each other, and
throwing errors if a message was sent with no subscribers (although I
may have misread this).

I'd like to break those assumptions, and I'd like some feedback as to
if that's a Really Bad Idea (tm).

First, I'd like to throw an exception if a message can't be sent by
the underlying transport. It looks to me that is what already occurs
if there is a failure in MSMQ (like disk full error), so I am thinking
this might be OK.

Second, since SQS allows queries, I'd like to move the subscription
tracking responsibilities out of Rhino for SQS and have each
subscription drive a query loop that will pick up messages that match
the type signature. Since producers & consupers can come up and go
down independently, and since SQS will store messages for 4 days, this
seemed like a nice way to scale.

I'm only a few days into this effort, so I'd really appreciate any
tips you could offer.

Thanks!

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