This is one of my favorite plug-ins for Visual Studio. In my opinion it works better than the Alpha drop down at the top of the window. For those of you that organize your source code this tool will be perfect.
Found this article written by an acquaintance on a few changes to the scrum default templates for Visual Studio. I find it a little easier than the default values.
http://crazedcodemonkey.blogspot.com/2008/12/comfortably-scrum-my-common-product.html
Here is a sample project which will show you how to send and receive JSON data from a WCF service using three of the most popular javascript libraries. You can do it without the libraries but why reinvent the wheel. Also, this is actually a VS2008 Studio Template so just download and drop the file into My Documents\Visual Studio 2008\Templates\ProjectTemplates\Visual C#\ and enjoy.
To use the template, goto File\New Project\Visual C# and look to “My Templates” and you should see WCF JSON.