I’m with Steven Frank on this:
For years I’ve had this bordering on Howard Hughesian vision that one day I would have a giant, private, wiki-like document that had a page containing everything I knew about anything. It would be complete, readable, editable, and searchable from whichever device I happened to have on me, from desktop computer, to laptop, to iPhone, even if I wasn’t connected to the net. It would support basic text formatting (bold, italic, bulleted list) and let me plop images into the page and position them. So far, this has proven to be mostly impossible. There are all manner of technologies that do bits and pieces of this, but no way I’ve yet thought of to combine them fluidly. (And believe me, I spend a lot of time thinking about this. So there’s no need to email about TiddlyWiki or Evernote because I’ve already been down that road.) I think what I want is an instant-on Newton-like device in the Kindle form-factor but with a stylus and it only runs OneNote (but better than OneNote) and is also my iPhone. Or something like that. Yeah. That sounds about right.
That’ll be the day.