The official Green Day site out of Germany, GreenDay.de, has posted a great contest and some pretty awesome content from ¡Dos!.
They just started a contest where residents of Germany can drive around the country to various cities and find posters that are specific to songs on ¡Dos!. Once that poster is found, there is information on it on how to listen to that particular track! Sounds pretty cool. Songs can be listened to starting Tuesday, November 6th.
And if you like the posters that you find, you can even download them via Green Day's German site.
Oh, you want them now? Well good news is that you can have them now! And they're really cool looking, to say the least. Check out this page and scroll to the bottom to view and download the wallpapers. There are 13 in total, one for each song.