Index: wp-includes/class-wp-xmlrpc-server.php
===================================================================
--- wp-includes/class-wp-xmlrpc-server.php	(revision 19632)
+++ wp-includes/class-wp-xmlrpc-server.php	(working copy)
@@ -64,6 +64,7 @@
 			'wp.getMediaItem'		=> 'this:wp_getMediaItem',
 			'wp.getMediaLibrary'	=> 'this:wp_getMediaLibrary',
 			'wp.getPostFormats'     => 'this:wp_getPostFormats',
+			'wp.getPostTypes'		=> 'this:wp_getPostTypes',
 
 			// Blogger API
 			'blogger.getUsersBlogs' => 'this:blogger_getUsersBlogs',
@@ -1702,6 +1703,56 @@
 		return $formats;
 	}
 
+	/**
+	 * Prepares post type data for return in an XML-RPC object
+	 *
+	 * @param array|object $post_type The unprepared post type data
+	 * @return array The prepared post type data
+	 */
+	function prepare_post_type( $post_type ) {
+		$_post_type = (array) $post_type;
+
+		$_post_type['taxonomies'] = get_object_taxonomies( $_post_type['name'] );
+
+		return apply_filters( 'xmlrpc_prepare_post_type', $_post_type, $post_type );
+	}
+
+	/**
+	 * Retrieves a post types
+	 *
+	 * @uses get_post_types()
+	 * @param array $args Method parameters. Contains:
+	 *  - int     $blog_id
+	 *  - string  $username
+	 *  - string  $password
+	 * @return array
+	 */
+	function wp_getPostTypes( $args ) {
+		$this->escape( $args );
+
+		$blog_id            = (int) $args[0];
+		$username           = $args[1];
+		$password           = $args[2];
+
+		if ( ! $user = $this->login( $username, $password ) )
+			return $this->error;
+
+		do_action( 'xmlrpc_call', 'wp.getPostTypes' );
+
+		$post_types = get_post_types( '', 'objects' );
+
+		$struct = array();
+
+		foreach( $post_types as $post_type ) {
+			if( ! current_user_can( $post_type->cap->edit_posts ) )
+				continue;
+
+			$struct[$post_type->name] = $this->prepare_post_type( $post_type );
+		}
+
+		return $struct;
+	}
+
 	/* Blogger API functions.
 	 * specs on http://plant.blogger.com/api and http://groups.yahoo.com/group/bloggerDev/
 	 */