Somebody mentioned a useful link to me today that I thought I would share:

Building a Pub/Sub Message Bus with WCF and MSMQ

This post was written last year by Tom Hollander, one of my colleagues down under. This was followed up by three posts to expand on the subject:

MSMQ, WCF and IIS: Getting them to play nice - Part 1, Part 2 and Part 3

I don't know how I failed to discover these before now; must get out on the Internet more.