I have to say, that as someone who is not fond of the "keyboardless tablet" concept, this is actually the first thing I've seen (granted in just Flash demo mode) that might actually be a genuine use for an otherwise worthless -- er, "niche"

-- platform. Even so, a lot of it is just gimmicks IMO. I really don't need an interactive magazine that cheers every time I click on an ad.
Oh, and cue JSWolf to decry what is sure to be yet another DRM'ed format.