I think the iPod Touch offers a somewhat similar experience, though as an iPhone and netbook user, I do prefer the "real" keyboard and larger screen of the netbook. In fact, I'm looking for an external iPhone keyboard after this comment. But I don't think you should assume the iPod Touch doesn't have phone-like distractions. Skype works quite well on the iPod Touch and would offer more, not less, opportunities for distraction than an SMS-only mobile phone.