It looks like the Kingdom Hearts on Wii rumors won't stop! Take the following from N4G.com as a grain of salt:
The latest rumor on the street is that, the wii is going to be getting some Kingdom Hearts loving from its creators. The first ever Kingdom Hearts game will be announced for the Wii at this years Tokyo Game show.
Hmm, well I can't exactly confirm on deny this. but what I can say is that it is rather opposite of previous interviews with Nomura, in which he has consistently said he'd like to see his next Kingdom Hearts game on a handheld system.
Interpret it as you will, we'll find out for sure come September!