You've probably already seen this, but 9to5mac has some insider information on the hypothetical Apple Tablet:
We had a chance to speak with a few friends in the publishing business last week. Both work in Manhattan for companies not previously quoted by the Wall St. Journal or Bloomberg but who were recently contacted by Apple with tablet information in the past two weeks. Here's what they've both corroborated: ...
I'm not taking a position for or against until I see it.