UPDATE: Wii Fit can support upto 8 users.
In a recently released PDF by Nintendo, it was found out the Wii Fit Channel will be available on May 19th when the game releases. The channel becomes installed when you insert the disc into your Wii, so more than likely, it won't be available to download. The Channel will not only provide you with updates and being able to track your progress, but it will also be able to provide you with new workout, even when you don't have your Wii Fit game disc inserted! So, the channel may have some online features to it, while the game itself, does not.
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