Great work!<p>If I may, here's some feedback...<p>But before that, let me explain why I'm interested in this kind of app. I like graphing stuff out - eg when reading some books recently I've drawn a visualisation of where the characters have gone in the story and what has happened. I've found there's no easy way to do this with most drawing/note taking apps on the iPad because you're restricted by the imprecision of your fingers when drawing. I've resorted to pad and pencil.<p>Therefore, the most important aspects for me are:
- zoomable
- ability to draw anywhere
- ability to add a text note anywhere
- neatening up (ie shape recognition) is a nice to have<p>So, feedback for your app:<p>- Zooming position - I expect the zooming to be centered on the midpoint between my touches rather than the top left of the screen/canvas.<p>- Zooming levels - I really want an infinite canvas...<p>- Line width - can there be a mode/setting where the line is the same width no matter the zoom level?<p>- Moving the canvas around - there needs to be some work on the gesture for doing this - after zooming in or out I found myself trying to use one finger to move the canvas and it of course drew a line. I know this is a really difficult problem! (I'm working on an iPad app myself with these kinds of UI problems). Perhaps, after zooming, switch modes to a move canvas mode and the user has to tap on the pencil icon to go back to drawing mode.<p>Anyway, keep up the good work and let me know if you want me to beta test.