The Bungie Card is a little slice of either your Halo 3 player profile or your Bungie.net profile that you can take with you wherever you go on the internet. Add it to your blog, add it to your forum signature. Whatever you fancy, it's a window into your Halo 3 or Bungie.net soul. It's a customizable widget that you can use to show off your accomplishments in Halo 3. The cards usually update about every 30 minutes. If you have your gamertag linked to your Bungie.net Profile you can customize your Bungie Card's background with your favorite screenshot.