Rumors are always flying here, but the new one is that there will be an ultralight 13" MBP by the end of the year. I am replacing my 12" powerbook; the size has been part of why I love it, and part of why I may get a macbook and not a pro. But if there's something much better coming...should I wait? I am a novelist, so my computer is basically a word processor and web interface. No games, no movie editing, etc (not yet, anyway). My old powerbook is fading away, however, and I am tempted just to replace it before total failure. What do you think?