Those exhausting days of opening the eShop, heading over to settings and scrolling through your download list to see if any of your purchased games have received updates are over.
Power up the eShop now and, if any updates for your games are available, you'll be met with a message telling you exactly that; it's then a simple tap to take you to the list of updates.
You'll also notice the Available Updates section actually works now, too.
3DS Ambassadors can download a free update for Metroid that adds Virtual Console features. Go wild and try it out.