Information on the CAA website says that EASA licences will be issued from 1 July 2012. JAA licences will cease to be issued after 30 Jun 2012. As an IMC rating cannot be added to an EASA licence, it cannot be included on a new licence after that date. There remains the question of how long it can be added to an existing UK or JAA licence.
As the addition of a new rating involves a reprint of the licence, if the software will no longer support printing JAA licences after 30 Jun that would seem to be the end.
The only FAQ relating to the IMC is Q25 which largely says what appears earlier in this thread.