So more specs are coming out. They haven't announced a HDD size for it but there will be one and you can use external HDDs with it which I think is a great thing since if they want you to be able to play games off of the console in other rooms you shouldn't have to walk back to the console to change games.
I still want to know more about the controller. I want to know if you'll be able to use it as a tablet (reading e-books and such) or will Nintendo restrict what we can do with it?
I'm also interested in how the different screens will interact. I would love to see something like a Mario game where four people are playing on their controllers and everything is shown on the TV for other people to watch. This seems like something Nintendo would want to do to reach more players.