The Japanese release date has been set, November 25th. North America and Europe are still listed as "TBA 2011," which seems a bit odd. How difficult can it be to localize a game like this? I'd think they'd want it out for the holidays, but I guess they may be a bit crowded with Wii Party, Kirby Epic Yarn, Donkey Kong Country Returns, and PokéPark. But Japan has all those too...
There's a possibility that the game has online play, but it is unconfirmed at this point. The box art shows a Nintendo Wi-Fi Connection logo, but this appears on all games that use Wi-Fi for any reason, so it could be something like leaderboards or another such minor feature.
The video shown at the Nintendo conference features Toad as a playable character. He's my favourite character so I'm glad to finally see he's in the game. Now all I need is a sign of my second favourite, and I'll be set.