Goldeneye isn't even supporting Wii Speak (that could change, but I don't expect it to).
So right now, this is the Conduit 2 headset. They're going to have trouble convincing people to buy it for just one game. The patching idea seems far-fetched on the Wii, which isn't set up for game patching. I can see the original Conduit possibly be patched for the headset, but I wouldn't hold my breath for Monster Hunter, and it's out of the question for Nintendo titles like Animal Crossing and Endless Ocean 1/2. (Whoa, did I just name every Wii Speak game?)