I'm updating Empathy to use the new API and I saw that TpConnection has an introspect queue. I had an idea: What about moving the "ready" property to TpProxy and put the queue there, with a method like tp_proxy_add_introspect_func(TpProxy*,TpProxyIntrospectFunc*); Like that TpChannel and TpConnection which inherint from TpProxy will have that queue to add requests for everything that could be cached before being "ready". And it makes my live easier in empathy since I'm planning to have EmpathyTpGroup inheriting from TpChannel and add stuffs like GetMembers and GetSelfHandle in that introspect queue. Of course EmpathyTpGroup could be moved to tp-glib (But not as it is right now). Xavier Claessens.