diff -r c9d8628a61cc -r e1833e9bd25b plugins/pubsub.lua
--- a/plugins/pubsub.lua	Sun Jan 01 22:17:39 2012 +0100
+++ b/plugins/pubsub.lua	Sun Jan 01 22:48:11 2012 +0100
@@ -202,8 +202,9 @@
 	error("Not implemented yet.");
 end
 
-function pubsub_node:unsubscribe(callback)
-	error("Not implemented yet.");
+function pubsub_node:unsubscribe(jid, callback)
+	self.stream:send_iq(pubsub_iq("set", self.service, nil, "unsubscribe", self.node, jid)
+	, callback);
 end
 
 function pubsub_node:configure_subscription(options, callback)