Does anyone have any advice on getting DNN to get DotNetNuke 6.0.1 to resolve internationalized domain name (IDN)*?  For example my personal domain www.siôn.com throws the following DNN error, even thought I've manual added the entries to the Database (circumvent UI validation):

Domain Name Does Not Exist In The Database

DotNetNuke supports multiple portals from a single database/codebase. It accomplishes this by converting the URL of the client browser Request to a valid PortalID in the Portals database table. The following steps describe the process:

1. Web Server Processing
   
   • When a web server receives a Request from a client browser, it compares the file name extension on the target URL resource to its Application Extension Mappings defined in IIS.
   • Based on the corresponding match, IIS then sends the Request to the defined Executable Path ( aspnet_asapi.dll in the case of ASP.NET Requests ).
   • The aspnet_isapi.dll engine processes the Request in an ordered series of events beginning with Application_BeginRequest.
2. HttpModule.URLRewrite OnBeginRequest ( UrlRewriteModule.vb )
   
   • The Request URL is parsed based on the "/" character
   • A Domain Name is constructed using each of the relevant parsed URL segments. 
     
     Examples: 
     
     URL: http://www.domain.com/default.aspx = Domain Name: www.domain.com
     URL: http://209.75.24.131/default.aspx = Domain Name: 209.75.24.131
     URL: http://localhost/DotNetNuke/default.aspx = Domain Name: localhost/DotNetNuke
     URL: http://www.domain.com/virtualdirectory/default.aspx = Domain Name: www.domain.com/virtualdirectory
     URL: http://www.domain.com/directory/default.aspx = Domain Name: www.domain.com/directory
     
     
   • Using the Domain Name, the application queries the database ( Portals table - PortalAlias field ) to locate a matching record. 
     
     Note: If there are multiple URLs which correspond to the same portal then the PortalAlias field must contain each valid Domain Name in a comma seperated list. 
     
     Example: 
     
     URL: http://localhost/DotNetNuke/default.aspx
     URL: http://MACHINENAME/DotNetNuke/default.aspx
     URL: http://209.32.134.65/DotNetNuke/default.aspx
     PortalAlias: localhost/DotNetNuke,MACHINENAME/DotNetNuke,209.32.134.65/DotNetNuke 
     
     Note: If you are installing the application to a remote server you must modify the PortalAlias field value for the default record in the Portals table according to the rules defined above.

Kind regards,
Siôn

*Notes: 
http://en.wikipedia.org/wiki/Internat...
http://www.icann.org/en/topics/idn/
 

Hmmm, won't look very professional...  
If I find time perhaps I'll take a look at the HttpModule.URLRewrite module and see if I can fix it myself.
Kind regards,
Siôn