Given no objections to my previous suggestion for "data visualization of the week" for the blog, we might as well start collecting some examples.
So to start, I simply ask that posters include an image of their own original work, along with a brief description of what the visualization is showing (plus any other interesting/insightful commentary). I ask that if your post is chosen as "the one", you basically do the same thing in your post for the site's community blog. (As a note, people can post work they have already done in answering questions on the site).
Obviously this will be available to the public, so only post if you are willing to share your work with the public. I don't think reproducible code is necessary here (nor do you need to divulge your data to the world if you do not want to), but that would likely be something the community highly values (and I hope would accompany your work at some point). If you do not want to publish the data used to make the graphic, it shouldn't be too much work to simulate new data and test the code used to generate the graph on the new (fake) data. If the graphic was produced via point and click in some instances, just saying how it was approximately done is sufficient as well (you could hand draw it if you wanted too!).
At this point we just need to accumulate a list of examples for members of the site to vote on. I do not have any other guidelines as of now (and as of now the length of time the thread will be open to posting and voting will be indefinite). In the future we may develop more rules (such as the photo site only asks people to vote on one entry, and asks people to not downvote any entries), but I hope such rules come by the collective decision of the community.
So post entries, and the response with the most upvotes will be asked to make a blog post detailing their data visualization. Everything else is TBD in the future.