As of RC revision 2061, we support keyPressNative, so typeKeysNative shouldn't be too hard, should it?
Unfortunately, it's harder than it looks. Converting a string of characters into java.awt.event.KeyEvent codes is non-trivial.
http://java.sun.com/javase/6/docs/api/java/awt/event/KeyEvent.html
Converting the lower case letters A-Z is pretty straightforward... just get the ASCII value of the upper case version. So how do you type a capital X? You hold down shift (keyDown), type an X (keyPress) then release shift (keyUp).
OK, not too bad. Now, how about punctuation like a $? That'd be shift+VK_4, right? Well, sure, on US keyboards, but on some keyboards you'll find the currency sign ¤ there.
http://en.wikipedia.org/wiki/Currency_(typography)
To convert even basic ASCII non-letters, you have to detect and support arbitrary keyboard layouts, including dead keys, etc.:
http://en.wikipedia.org/wiki/Keyboard_layout (The quote symbol is notoriously finicky across layouts.)
And what about the rest of Unicode? Holding down the Hiragana function key? And on and on and on.
I think abbot has some code to support this:
http://abbot.sourceforge.net though I haven't really looked, and anyway we can't use their code because it's CPL.