The documentation for the implementation of the MetaWeblog API for MSN Spaces is now available on MSDN.

Developers interested in building applications that can be used to create, edit or delete blog posts on a space should read the documentation about the MetaWeblogAPI and MSN Spaces. Questions about the API should be directed to the MSN Spaces Development forum.

PS: I forgot to blog about this over the holidays but astute folks who've been watching http://msdn.microsoft.com/msn already found this out.