I personally tested these Bluetooth keyboards with my G1 OS 1.5 and OS 1.6
* ThinkOutside Shasta Keyboard (STWBBBT)
* Freedom Input Universal Keyboard I
* Freedom Input Universal Keyboard II
* Chainpas SmartKeyboard
* Freedom Blackberry Keyboard
* Amzer SmartKeyboard
* Xema BlueKeyboard
* Snap-N-Type Keyboard
you can find the driver here: http://www.mymobilegear.com/AndroidKBDriver.php
* ThinkOutside Shasta Keyboard (STWBBBT)
* Freedom Input Universal Keyboard I
* Freedom Input Universal Keyboard II
* Chainpas SmartKeyboard
* Freedom Blackberry Keyboard
* Amzer SmartKeyboard
* Xema BlueKeyboard
* Snap-N-Type Keyboard
you can find the driver here: http://www.mymobilegear.com/AndroidKBDriver.php