If you live in Israel, you could come and see Guy Ron and I giving our PDC impressions to the architects user group. I just got indigo to work after a few hours of poking. If you are working in a workgroup mode for Longhorn (you are not a part of a domain) you need to tweak the machine.config a bit. Now I have a Service that is : Reliable, Secured and Transaced all in one demo ;).
You could read all about the tweaking in the Longhorn SDK readme. The documentation is not 100% correct, I'll post the fixes later on.