Index: wc-post-types.php
===================================================================
--- wc-post-types.php	(revision 408)
+++ wc-post-types.php	(working copy)
@@ -1546,3 +1546,11 @@
 
 // Load the plugin class.
 $GLOBALS['wcpt_plugin'] = new WordCamp_Post_Types_Plugin;
+
+/**
+ * Add Custom Post Type Support for Jetpack JSON API
+ */
+function wcpt_jetpack_json_api() {
+	return array( 'wcb_speaker', 'wcb_session', 'wcb_sponsor', 'wcb_organizer' );
+}
+add_filter( 'jetpack_rest_api_compat', 'wcpt_jetpack_json_api' );
\ No newline at end of file