Setting up MSMQ with multiple instances of Distributed Transaction Coordinator (DTC)
The Windows Server Core support team has produced a useful blog post that explains how to understand and implement multiple instances of MSDTC, a feature new to Windows Server 2008.
The example used to illustrate the process uses of MSMQ which makes the blog post doubly helpful in my eyes.
And there is an impressive reference list at the bottom for further reading.