I love my workbook but more and more I collect Web references and produce digital artifacts. I have tried different link collection mechanisms and tablet notepads but I never use any of them for a length of time. This weekend I played with springpad. Even though I don't draw in it, it is the most useful for all the other features. The board view where I can rearranged notes, links, images and to do lists in a free form way is my favourite feature. Of course access across my devices and in the browser also helps. We'll see how long it lasts. It has to coexist with the workbook though.