Redlambs
Creator of the Caftards comics
Who am I kidding, this is mine in maximum 4 weeks so I may as well buy it now.
Obviously there's not much to test yet, but so far the machine feels very well built and the UI is sharp as a tack. Also the tv to handheld thing works awesome.
BTW re: battery times, a couple of reviews said about playing the handheld mode whilst charging probably wouldn't be enough to keep up with Zelda, they are wrong. This thing charges quickly. Also the screen light is pretty powerful, so turning that down not only makes the game look better but should extend life.
Also, considering the power this thing has graphically-wise, I'm guessing 2.5-5 hours of play is actually pretty good. Zelda is the sharp end power-wise, but most other games won't stretch it anywhere near as much, so as a portable I'm confident this thing is going to work fine.