There are many ways this project could be extended. Why don't you try a few?
Display the actual photo (as a thumbnail in a
CANVAStag) in the note list view instead of the simple photo icon. For a larger challenge, support the caching of thumbnails so that they don't have to be regenerated each time the view appears.Allow the app to use the user's photo library in addition to taking a picture with the camera.
If the user taps on the image (not the icons), display a new view that shows the image at full size. If you want a bigger challenge, allow the user to interact with the image by supporting pinch-to-zoom. If you want even more adventure, support rotation as well.