I spoke briefly at Devscovery NYC tonight about WCF and WS-ReliableMessaging. As promised, the code is here:

 
Read the readme.txt file in the archive before running the sample.
 
Some other things you can do with this sample:
1) Add IsInitiating and/or IsTerminating to the SubmitOrder OperationContract
2) Create a new channel stack in the loop on the Sender.
 
When I have a bit more time (in the next week or so) I will expand on what these settings do...