The Soundcloud Silverlight API is aimed at .NET, Silverlight and Windows Phone 7 Developers.
The API will allow you to develop applications talking to and working with http://soundcloud.com.
There are currently 3 different libraries planned:
- .NET Library (for Windows Applications)
- Silverlight Library (for Silverlight Applications)
- WP7 Library (for Windows Phone 7 Applications)
The project is in the early planning phase, so that might chance over time.