This is definitely going to be sold as an upgrade option to existing V1.1 minimig owners / Mini-ITX minimig owners may also be able to utilize this upgrade board.
Whether or not it becomes a bundled item with new minimig sales remains to be seen. There is a rumor that acube may be partnering to manufacture these ARM boards.. While this would be an interesting development, I would hope it wouldn't slow down initial availability.
Everyone is anxiously awaiting word from Jakub as to manufacturing and distribution of the board. Only a small number of individuals have the ARM board at this point.
My understanding is that we are VERY close to an official release.
The best thing to do is continue expressing your interest here until we learn otherwise.
Maybe Jakub will chime in an give an update as to what is going on...
Jakub? Are you there?