A: 

Can you post the service contract in your assembly, and the accompanying config file? Can you also post the command line used to invoke WcfSvcHost? I don't guess you've used that in VS2005 to debug (since it was only released with VS2008) - maybe there's something wrong there.

At first glance, it looks like the service type referenced in the config file probably isn't available in the service assembly.

Marc

marc_s
In a roundabout way that is what it was. I had an old referenced dll in the windows assembly. Even though I specified the dll in the bin, directory, upon rebuild, VS for some reason switched to the assembly in the GAC. Removing the old assembly from the GAC fixed the issue.
Mike_G