There is a nice app, that now supports the Pro1 keyboard. FinQwerty improving the functionality.
I have used test-versions of it for months for both QWERTY and QWERTZ, and it works just great!
See the current layouts here http://android.onse.fi/finqwerty/#pro1, here a few examples
It is (currently) especially great for those that wants to use the physical QWERTZ for standard US or for Scandinavian languages on either QWERTZ or QWERTY
UPDATE:
The authour @Anssi Hannula has added more layouts, including Czech, US-International, and improved version of