This is very exciting indeed. I wonder does it work for wiifit as well?
With a bit Digging, it should work with ANY Game! Real RegionFree is here! But as this a really simple patch, it just works with games that gave you Dual Channels. And you should make every patch from ground up to the original _update.inf, just to be sure!
My patcher should work with any game that did already work but produced dual channels.
So (according to the wiki) you can play WiiFit on an US console without dual channels ot 15% trick
if you patch the game's original __update.inf.
On a side note: Since games signed with trucha signa might not work forever (meaning if Nintendo fixes the bug)
you should be able to play the brickblocked version of the game after you run the update of the patched one...