The new IWebCF that we are working on uses Windows Communication Foundation. It will only bind to one web address so you have to select one from a drop-down on the configuration screen. Sometimes after you change it and then browse to the service address you get an error that starts off like this:

"Could not load file or assembly App_Web..."

The fix can be found at this thread. Basically you go to this directory on the computer:

C:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files

and delete all the files you find there (or if you can the files for the application you're running).