As long as you can give me precise fast typing and full screen Fingerterm (i.e. without on-screen keyboard), I am pledging to buy your TOHKBD v2 at 150€ with blank keys right now!

If I can assign a key-combination to quickly show and hide the current keyboard-layout on-screen, the blank keyboard will be quick enough to learn :-)

Besides, if you give me enough keys to cover all of the N900-keyboard, and easy means of setting the key mappings, I can just copy the N900 layout and don't have to learn the keyboard at all!