<p>I am well aware that the Rest based approach is targeting HTTP.  I would love to use the REST APIs and other goodness between processes on the same computer.  Since ADO.NET data services is built on top of WCF it would seem reasonable to assume that the transport in configurable to work with any of the WCF supported transports.  Anyone know if there is a way to configure it to send traffic via namedpipes?</p>

In .NET 3.5 there is built-in named pipe binding for WCF. See the
MSDN
for details.