Nintendo of Europe have updated their site, and they’ve done a good job. You can now swap Stars for Wii Points. Four Stars will buy you a Wii Point, which seems reasonable.
There’s also loads of new content in the Stars Catalogue, some of it even worth having, including cute pull-back Mario Kart toys made by child slaves in China.
The site also seems less sluggish and looks loads nicer too. So well done there, Nintendo of Europe.