Microsoft released an SDK to access several download sites via an XML Web
services-based API. Use the Microsoft.com Web Service SDK to start developing applications
that integrate download information into your applications, business processes,
and Web sites.
The Microsoft.com Web Service is an XML Web service that will enable
you to integrate information and services from MSDN, Technet, other
Microsoft.com sites, and Microsoft Support. In order to serve as a test for
our new architecture, Version 1.0 of the Microsoft.com Web Service is limited
to providing information about top downloads from Microsoft.com. Future
releases will build on this architecture to provide access to a broader
variety of Microsoft content and services.
It seems, unfortunately, that we cannot access to the Microsoft Knowledge Base through the Web services API ... :-(
It is actually just about downloads.