For replacing xpidl with a python version.
Per conversation today with jst, this is not an immediate priority.
This is blocking dom bindings work and is blocking HTML5 implementation work. There are parts of HTML5 that we simply can't implement right now because the IDL they use can't be expressed in a way xpidl understands (e.g. interfaces shadowing properties on ancestor interfaces).
This is a Q3 goal and I'm actively working on it again.
Declaring victory here.