Since it's a timely update I guess I'm allowed to double post.

Anyways, it appears that Europe has already gotten Mario Kart Wii and they've been leaking a lot of new information about it. So far Baby Peach, Funky Kong, Dry Bowser (basically an undead Bowser), Princess Rosalina, Baby Daisy, and your Mii have been confirmed as playable characters. There's also a couple of new items like this weird thing that speeds you up but shrinks you at the end but can be passed on to other racers and a POW Block that will spin out whoever's ahead of the user after 3 seconds of its use.

I don't really have any really good links that help confirm this except for these two. Anyone who has any better links please feel free to upstage me with them. Seriously, I also want to see pictures confirming the new items and characters since the previous two links don't have any.