I have just released a new project on CodePlex : Azure SB Lite (http://azuresblite.codeplex.com)
Every day, we use the Service Bus package from Nuget to access Azure Service Bus from out application based on .Net Framework. The package exposes very simple APIs !
To access Service Bus from .Net Micro Framework device, we need to use HTTP(S) or we can use AMQP(S).
On CodePlex there is the great AMQP .Net Lite library from Microsoft (http://amqpnetlite.codeplex.com) to access Service Bus using AMQP but you need to know all the main concepts of AMQP protocol like connection, session, link and so on.
To avoid this, I wrote a wrapper around above library to expose same APIs as Service Bus package for .Net Framework but from ... .Net Micro Framework !
You can now port your code in a very simple manner !
Of course, it works on Netduino 3 Wi-Fi thanks to its SSL/TLS support ! :-)