Every week Photography SE users are encouraged to submit photos. The rest of the community offers critique which generates interesting discussions. Winning images are then displayed on the main page for 1 week.
Could we do something similar with maps, screen shots of cartographic products or web content? Each submission (small image with a link to a website/ larger map) would have to be accompanied by a brief description, purpose, etc. Entries with most votes could be featured at the top of the main page similar to how user photos are displayed on Photography SE.
Unlike Photography SE our entries would not only be judged on visual presentation but also idea, content, usefulness, etc. It could generate interesting discussions.