Over the last few years I have been, rather than taking notes in the keynotes (and other sessions) at the ALT Conference #altc drawing pictures. This is sometimes called sketchnoting.
My sketch notes are really for me, rather than other people. The process of sketching allows my to digest for myself what is been talked about and demonstrated. The sketch note provides me with a mechanism that provides a process for my interpretation of what is being said and what I understand from the talk. The process of sketching engages me in the talk in ways in which note taking does for others, or conversing on the Twitter. They are not done for other people, if other people find them useful then that’s just a bonus. Having said that I do share them online, through Twitter (and Flickr).