The larger size drawing canvas that was previously only available in the Challenges forum is now available in every forum! You'll be asked which canvas size you want to use when you start a new drawing.
We have a new Avatars board in the Oekaki. Here, you can draw square images that can be used as 100x100 pixel forum avatars. You can click a button under the drawing after you post it to allow other people to use those avatars too .