There is a feature here on this site that is a lot of fun; if you've tried it. It's the "Who's on Line" from the "Quick Links" in the menu bar.
The first time I used it, it felt just like "The Marauder's Map". There is a sense that you're doing something
not quite right when consulting it. The nicest of which is sending a PM to someone you know is online and refreshing the page to see "Viewing Personal Messages". It's the closest you can get to someone and quite Potterish.
