Considering we are only a couple months from celebrating the 5 year anniversary of the HTC Dream launch, and the birth of Android devices, how about a shout out to how far Android has come.
Accent: Metallic Silver
(Mimicking the White Dream scheme)
Engraving & Boot up Message: 5 years in the making
Wallpaper: a wallpaper with all the versions of Android tiled in the background. (Not like the one below, that's just to get the gist of it)