I played this in Hong Kong as my dad has the Japanese version and it's incredibly fun. I'll have to upload some videos my brother took of our family members doing virtual hula hoops or racing around a track. I definitely plan on getting it when it comes out in the US.
You know I really enjoyed Wii fit. It made me try activities that I simply wouldn't otherwise such as yoga and aerobics. Including a very outdated system of body mass index was a bad move on Nintendo's part and incentives to keep coming back after the initial few weeks would be nice.
A nice first step into a hopefully booming fitness genre of games.
Hula hoop mode needs > 10 minute setting. Ab-based exercises are all the rage right now in Japan. Wii resort should be another home run for Nintendo... the samurai sword action looks like fun.