Though it's natural to wonder, it's just absurd to ask in these forums when Mitel will do anything. They will do what they will do when they will do it, and not a moment before. Mitel owes those who are not ServiceLink partners absolutely *nothing* but to honor its obligations under the GPL. Nowhere does that license compel them to give anybody any information whatsoever as to release dates and/or features.
So don't base production network decisions on Mitel's timetable unless you're a ServiceLink partner!
Beggars can't be choosers. Please note that this is spoken by a beggar, as a beggar ... I'm neither a partner nor a ServiceLink customer.
While I'm on the subject, seeing as it's Thanksgiving Day here in the USA -- all of us here should be in greater or lesser measure grateful that Mitel chooses to expend resources (server space, bandwidth, personnel time) to support these forums. Many thanks, gentlemen and ladies!