I'm also waiting to see if there is a hack to get bluetooth keyboard support active on the iPhone 3G, as it is currently disabled.
For the original iPhone, check out the jailbreak app BTstack Keyboard. It installs an alternate bluetooth stack that can pair the keyboard. You have to disable the built-in bluetooth feature in order to use it, though.
I'm also waiting to see if there is a hack to get bluetooth keyboard support active on the iPhone 3G, as it is currently disabled.
For the original iPhone, check out the jailbreak app BTstack Keyboard. It installs an alternate bluetooth stack that can pair the keyboard. You have to disable the built-in bluetooth feature in order to use it, though.