Ulf Nawrot from Germany seems to be doing a post-it project. Unfortunately I can’t tell you much about it because his site doesn’t have any information apart from the images and his contact details.
The page of post-it drawings is utterly fab though – go have a look. While the individual drawings are fun, you definitely need to see them all together to get the full effect. It really shows how effective a repeated form can be – even though the drawings are all quite different, the yellow of the post-it’s and the repeated size, ties them all into a coherent visual whole.