Yea, noticed that too, so I emailed Gomadic before I bought the stylus and they suggested pondNotes. I tried it out, but after my initial run with the app, I couldn't find the handwriting functionality, I emailed them again, to which they replied:
If you look closely at the pics on the website, it is showing an ipad.
Oh well, I bought the stylus and it should come today, hopefully there's a good app out there somewhere. I tried Just Draw too and it is quite sluggish.
We are not so familiar with it, but I belive you can.