I was finally able to create a method to allow you to code your IWeb extensions in VB or C# and still have a single point of entry (the webservice at: /DesktopModules/IWeb/webservice.asmx)

In the next version of IWeb there will be a directory that you will be able to add C# methods to and a directory tree that you will be able to add VB methods to.

This works because the C# class inherits from the VB class. The .asmx file is pointing to the C# class.