The FreeLoader for the Wii (which enables you to play imported games such as Super Smash Brothers Brawl) is now available to order on Play.com
It's out of stock at the moment, but I'm pretty sure it won't be too long a wait for new stock to arrive, and the free delivery is worth it!
Taken from Play.com :-
Play ANY region of Wii or GameCube game on ANY Wii
Easy to use
No console modification required
Does not invalidate warranty
Play games never released in your region
Play local games on your imported console
100% unofficial - Not endorsed by Nintendo
With FreeLoader for Wii, you can play ANY region of game on your UK Wii!
FreeLoader for Wii is really easy to use. Simply insert your FreeLoader for Wii disc and load it in the usual way. When the drive stops, eject the FreeLoader for Wii disc and insert the game, which then loads and plays just like it would on its own region of Wii. It's as simple as that! FreeLoader for Wii is 100% unofficial, and requires no modifications to your console. As well as letting you play Wii games from all regions, FreeLoader for Wii also works with imported GameCube games when played on your Wii.