I just want to clarify my previous post and address some of the questions.
This would not so much be a new challenge, nor is it a call to start writing bigger or more "finished" pieces. There would be no banners for completing #x pints or any such thing. And really what you want to consider a qualifying piece is up to you. And no one needs to use the tag at all.
What I envision the label being for is to recap and regroup smaller pieces into larger, cohesive ones. You would be able to take pieces from long ago and frame them to better fit with newer ones. You could round up recent pieces into a single post, editing and adding transitions as necessary, for easier viewing. You could tackle larger projects in little bits and then bring them back together in a single piece. You could just use the tag to showcase a single completely original piece that you feel provides an entire story.
As for older pieces and how to handle these pieces in your index, again it's up to you. As I said above, we're not going to have any banners or rewards for this, so you're welcome to add the tag to old posts.
Here is a graphic for pints. Using it is totally optional. Also, feel free to recolor to your tastes.