diff --git a/doc/TODO b/doc/TODO
index b07340d940..2395fe348a 100644
--- a/doc/TODO
+++ b/doc/TODO
@@ -66,11 +66,16 @@ N  . Implement pending controller features.
     o Way to handle overlong messages
       o Specify fragmented format
       o Implement fragmented format
-    - Event for "new descriptors"
+    o Event for "new descriptors"
     o Better stream IDs
+    o Stream status changed: "new" state.
     - EXTENDCIRCUIT <depends on revised circ selection stuff.>
-    - ATTACHSTREAM <depends on making streams have 'unattached' state.>
-    - Stream status changed: "new" state.
+    - ATTACHSTREAM 
+      - Make streams have an 'unattached and unattachable' state.
+      - Add support to put new streams into this state rather than try to
+        attach them automatically.  ("Hidden" config option.)
+      - Time out never-attached streams.
+      - Implement 'attach stream X to circuit Y' logic.
     - Tests for new controller features
 R . HTTPS proxy for OR CONNECT stuff. (For outgoing SSL connections to
     other ORs.)
diff --git a/src/or/connection_edge.c b/src/or/connection_edge.c
index 4d7f9d020a..7aea8ce2dc 100644
--- a/src/or/connection_edge.c
+++ b/src/or/connection_edge.c
@@ -812,6 +812,7 @@ static int connection_ap_handshake_process_socks(connection_t *conn) {
       }
       rep_hist_note_used_port(socks->port, time(NULL)); /* help predict this next time */
     }
+    control_event_stream_status(conn, STREAM_EVENT_NEW);
     conn->state = AP_CONN_STATE_CIRCUIT_WAIT;
     return connection_ap_handshake_attach_circuit(conn);
   } else {
diff --git a/src/or/control.c b/src/or/control.c
index a23c54bc4f..4024fd4274 100644
--- a/src/or/control.c
+++ b/src/or/control.c
@@ -871,6 +871,31 @@ control_event_logmsg(int severity, const char *msg)
   send_control_event(EVENT_WARNING, (uint32_t)(len+1), msg);
 }
 
+/** DOCDOC */
+int control_event_descriptors_changed(smartlist_t *routers)
+{
+  size_t len;
+  char *msg;
+  smartlist_t *identities;
+  char buf[HEX_DIGEST_LEN+1];
+
+  if (!EVENT_IS_INTERESTING(EVENT_NEW_DESC))
+    return 0;
+  identities = smartlist_create();
+  SMARTLIST_FOREACH(routers, routerinfo_t *, r,
+  {
+    base16_encode(buf,sizeof(buf),r->identity_digest,DIGEST_LEN);
+    smartlist_add(identities, tor_strdup(buf));
+  });
+  msg = smartlist_join_strings(identities, ",", 1, &len);
+  send_control_event(EVENT_NEW_DESC, len+1, msg);
+
+  SMARTLIST_FOREACH(identities, char *, cp, tor_free(cp));
+  smartlist_free(identities);
+  tor_free(msg);
+  return 0;
+}
+
 /** Choose a random authentication cookie and write it to disk.
  * Anybody who can read the cookie from disk will be considered
  * authorized to use the control connection. */
diff --git a/src/or/or.h b/src/or/or.h
index 9b86307c56..4622cfb196 100644
--- a/src/or/or.h
+++ b/src/or/or.h
@@ -1362,7 +1362,8 @@ typedef enum stream_status_event_t {
   STREAM_EVENT_SENT_RESOLVE = 1,
   STREAM_EVENT_SUCCEEDED    = 2,
   STREAM_EVENT_FAILED       = 3,
-  STREAM_EVENT_CLOSED       = 4
+  STREAM_EVENT_CLOSED       = 4,
+  STREAM_EVENT_NEW          = 5
 } stream_status_event_t;
 
 typedef enum or_conn_status_event_t {
@@ -1381,6 +1382,7 @@ int control_event_stream_status(connection_t *conn, stream_status_event_t e);
 int control_event_or_conn_status(connection_t *conn, or_conn_status_event_t e);
 int control_event_bandwidth_used(uint32_t n_read, uint32_t n_written);
 void control_event_logmsg(int severity, const char *msg);
+int control_event_descriptors_changed(smartlist_t *routers);
 
 int init_cookie_authentication(int enabled);
 int decode_hashed_password(char *buf, const char *hashed);
diff --git a/src/or/routerlist.c b/src/or/routerlist.c
index e521cae011..5c8a46a743 100644
--- a/src/or/routerlist.c
+++ b/src/or/routerlist.c
@@ -886,6 +886,11 @@ router_load_single_router(const char *s)
   if (router_add_to_routerlist(ri)<0) {
     log_fn(LOG_WARN, "Couldn't add router to list; dropping.");
     return -1;
+  } else {
+    smartlist_t *changed = smartlist_create();
+    smartlist_add(changed, ri);
+    control_event_descriptors_changed(changed);
+    smartlist_free(changed);
   }
   log_fn(LOG_DEBUG, "Added router to list");
   return 0;
@@ -914,16 +919,23 @@ int router_load_routerlist_from_directory(const char *s,
     return -1;
   }
   if (routerlist) {
+    smartlist_t *changed = smartlist_create();
     SMARTLIST_FOREACH(new_list->routers, routerinfo_t *, r,
-                      router_add_to_routerlist(r));
+    {
+      if (router_add_to_routerlist(r)==0)
+        smartlist_add(changed, r);
+    });
     smartlist_clear(new_list->routers);
     routerlist->published_on = new_list->published_on;
     tor_free(routerlist->software_versions);
     routerlist->software_versions = new_list->software_versions;
     new_list->software_versions = NULL;
     routerlist_free(new_list);
+    control_event_descriptors_changed(changed);
+    smartlist_free(changed);
   } else {
     routerlist = new_list;
+    control_event_descriptors_changed(routerlist->routers);
   }
   if (router_resolve_routerlist(routerlist)) {
     log_fn(LOG_WARN, "Error resolving routerlist");