I downloaded and compiled the trunk of WiiRemote.framework and wrote a simple app to test it on my G4 notebook. It works if you first go to Bluetooth Explorer and via the GUI select unregister all registered devices.
I want it so that it works as well on 10.5 PowerPC as is does 10.6 Intel, but I am not knowledgeable enough yet of Bluetooth on Mac to do this myself, so Im willing to pay to get it fixed. Ofcourse the fix will be donated back to the darwiin remote project.
Please let me know if you have the ability and we can work something out.