A lot of people are getting hot under the collar over a listing on the ESRB website for something called Zelda Universe. It's down as an "online" title, which considering the publisher and the franchise sounds interesting.
Only, it's not.
Zelda Universe is listed as "online" because, as is pointed out here, it's a website, not a game. Namely, this site, Nintendo's hub for all things Legend of Zelda. The company has done the same thing with its Advance Wars site, obtaining an ESRB rating for all the various types of content (some violent) that are being hosted there.
What's more, the Zelda Universe listing dates back to 2008.
It's a little weird, given no other major publisher bothers getting ESRB ratings just for their websites, but then no other major publisher is as concerned with game ratings for kids as Nintendo is, so that probably explains it.