Machine.Mta is a collection of extensions and utilities for use with the MassTransit service bus. It provides some lower level functionality as well as interfaces as messages and just general integration with other Machine projects.
-) I think ToString on the generated concrete messages should display the properties of the message.
-) Better message immutability scenario. Only allow writing once?
-) Fault/Error/Poison message handling.
-) Subscriptions using the MT implementation.
-) Sagas using the MT implementation.