- take a look at the session expiration date
- implement touch events for iPad
- test big coordinates
- own web design: http://openiconlibrary.sourceforge.net/gallery2/?./Icons/actions&200
- calculate an offset for strokes to avoid overhead when sending big coordinates
- multiple layers (max. 5)
- read-only mode
- comments
- live and static images
- selection and fill tools
- copy & paste
- upload images
- any-undo