I am currently developing an ipad app..a simple app but lot of importance to user experience..
The app is a simple Software form of whiteboard available in conference rooms.
so when you open the app you will be presented with a white board with 3 coloured pens (Red,Blue,Green) and an eraser to erase a part of the diagram..
The sketch what we make gets stored automatically which we can later email to friends or store it to photo album..
I completely agree there are lot of drawing apps available out there and a lot of you are already using some of them..
IF so,can you let me know what you felt like,you needed in those apps which is currenlty not available and a feature which you would like to add in those apps.