The Eee PC with Wacom digitizer that I tested was around $500, so the digitizer is probably not that expensive. And I'm not sure yet that those iPad styluses really can get the job done. That pixel-perfect precision of Wacom is what makes it feel so close to usual pen and paper, because it records every slight movement of your hand, every little quirk. If conductive stylus cannot get me that feel that I'm really writing like on a paper, then why should I move to tablet instead of continuing to use usual paper?
I am not searching for a way to get the job done, I already have a way to take notes by writing them on paper. I am simply sharing my thoughts on what capabilities a tablet should have to make me consider buying it. If it doesn't give me same or better experience than pen, then it simply doesn't make sense for me to move from one way of taking notes to another that is worse than the current one.