Drupal to WP XML-RPC a plugin for WordPress by aliciagh adds some Multisite-specific functions to WordPress XML-RPC interface (http://yourdomain.com/xmlrpc.php). This plugin is required for the correct work of a Drupal module named Drupal to WP.
Functions:
drupal.newBlog – Create a new blog
drupal.getUsers – Get all users of your installation
drupal.getUsersBlogs – Get blogs of a user
drupal.getBlogId – Get a blog ID
drupal.getCategories – Get a list of categories on a given blog
drupal.newUser – Create a new user
drupal.deleteUser – Delete a user
Functions return error code 700 or 403 if there are problems with authetication and error code 500 if there are other problem.
Download and info: http://wordpress.org/extend/plugins/drupal-to-wp-xml-rpc/