Does anyone know of a generic phone number parsing library for .NET? Ideally I'm looking for something similiar to the Ruby Phone library.
You could start with Advanced Phone Number Type Implementation on CodeProject. At first glance, it seems that it may be lacking the internationalization pieces found in the Ruby library you referenced.
Of course, you could always start with an existing library and add on to it, and depending on the license of the original library, you might even choose to release your own that has exactly what you need.