So we have given ourselves a deadline. We think we will be able to release a developer image of the SD Card for the unit in two weeks. That means that by 29th October, 2014 we will have for download a root file image which you can put onto an SD Card, put that into a raspberry pi and start testing.
THIS IS NOT A CONSUMER VERSION.
IT WILL BE INSECURE.
IT WILL HAVE BUGS.
It will almost possibly / probably lose any bitcoins you send it.
But .. it will be suitable for feedback.