Is there a text editor for the iPod Touch that fills the function of the visionary-but-before-its-time Notes application on the legendary [Apple Newton](http://en.wikipedia.org/wiki/Newton_%28platform%29)? Specifically, looking for something that accepts typed OR handwritten text, freely sketched graphics, collapsable outline with check boxes, etc.?

In other words, is there software for our handheld devices in 2012 as sophisticated as the state of the art from 1996?