Hello. We did study also a transparent keyboard option, but at least I personally didn't see it really a very viable option in terms of the UI design. The biggest problems:

- Level of transparency. Take a use case like writing in Notes or Email or Chat. It's rather hard to design a level of transparency where you see both the keyboard and the underlying text clearly.
- Moving the cursor (and other interactions). How does the user then move the cursor (or highlight the text) if the keyboard layer comes over the application area. (Using the HW keys isn't really a great solution for that...) Not to mention the other interactions there. What if the user is typing into a small text field and he wants to scroll the field using the scroll bars etc.

For instance this one: http://www.internettablettalk.com/fo...ead.php?t=9199 (Nice work Tony, btw.) But I really have my doubts whether you can actually see the text behind the keyboard.