Turning it off does remove the power. I think you can find the information you seek in the wiki.
It would be a pretty good trick to update your keyboard firmware without your notice. Especially just for the sake of installing a keylogger in the wifi "firmware" that's on your encrypted root device (it would be still much easier to modify the much better documented operating system). If you're that worried, you can permanently remove power to the chip pretty easily. The schematics are available. But that won't stop someone doing the same for whatever alternative interface you use.
The keyboard firmware has been cracked. You can do what you like with it, example source code is available.
I'm tempted to install my USB dongle inside the case of the PBP.
It would be a pretty good trick to update your keyboard firmware without your notice. Especially just for the sake of installing a keylogger in the wifi "firmware" that's on your encrypted root device (it would be still much easier to modify the much better documented operating system). If you're that worried, you can permanently remove power to the chip pretty easily. The schematics are available. But that won't stop someone doing the same for whatever alternative interface you use.
The keyboard firmware has been cracked. You can do what you like with it, example source code is available.
I'm tempted to install my USB dongle inside the case of the PBP.
