Index: doc/Announce2.2.0
===================================================================
diff -u -r376841b0f50119035335ed6a157d34695df534af -rbb7c3cbb52453cbd2f08e9d40670a802ef301609
--- doc/Announce2.2.0	(.../Announce2.2.0)	(revision 376841b0f50119035335ed6a157d34695df534af)
+++ doc/Announce2.2.0	(.../Announce2.2.0)	(revision bb7c3cbb52453cbd2f08e9d40670a802ef301609)
@@ -64,6 +64,11 @@
 
   * Upgraded driver and utilities to mongodb-c-driver 1.9.3 and libbson 1.9.3.
   * Add regular expression queries to conditions in nx::mongo
+  * Improved portability between platforms/ OS
+  * Added auto-cleanup of resources (objects) for long-living
+    execution environments (destroy_on_cleanup).
+  * More robust serialisation of object graphs, by preserving birth
+    classes in serialization.
 
 - nx::test