Yeah I'm really interested to see how the distribute all the information. I really hope it's a hype fest as I tend to think Nintendo need it and are generally a little bit staid (Apart from Zelda of course). Get the big name partners, preferably individuals like Rein/Cliffy or Gabe etc out there. Show/talk about the big games and engines coming. Show us cool shit about their online approach etc. Skip the charts and bullshit. In fact I wish they'd skip the 3DS even
I usually tend to think that Nintendo over-emphasizes its portables to the detriment of their home systems, but the 3DS might need a tiny bit of stage time, if only to announce a few major titles and/or features. Not much though - there'll be plenty of time for the press to spend on the show floor for 3DS reporting, as the 3D features would be better-demonstrated there in person anyway.
With the Wii U, I think Nintendo needs to throw everything they've got into that presentation and the ensuing smaller events throughout the week. Make it a relentless flow of information, news, game announcements, feature surprises, etc. Dump so much information on the press to the point where they have trouble keeping-up, to the point where many of them don't find-out about all of the news events until they return home. Overwhelm them, I say!