Today, Eyal Vardi from Experts4D (a large consulting company in Israel who specializes in advanced .Net technologies) released a new version of this open source project - WCF Visualizers.
If you are not familiar with those visualizers, you should, since they make developing and debugging WCF based solutions much much easier.
The project contains two main visualizers:
From this release's page:
New features this release 1.5:1. ClientRuntime Visualizer was added2. Binding Visualizer was added3. IError Handler View5. SecurityContext Visualizer was added6. Security Visualizer was added
You can find the WCF Visualizers Home Page on codeplex, and you can find the latest release here.
Enjoy!