Something wonderful has happened! Jürg Billeter -- mastermind of Vala -- pushed support for server-side async dbus into Vala. I hope I didn't annoy him too much (having continuesly pestered for almost a year now), but the net effect is that we can now continue working on fsogsmd, the Vala implementation of our dbus GSM server (see http://docs.freesmartphone.org for an overview of the API). Yay!