A blue light special has hit North America and Europe, courtesy of our entertainment overlords at Nintendo.
No new features have been added to the Wii console repertoire, instead providing "behind-the-scenes fixes" to improve overall system performance.
No further details than that have been provided, but we'd wager it has something to do with the Wii Sports Resort bug that Japan recently had patched through a system update, conspicuously numbered 4.1.
The bug in question caused players to be forced to watch the Motion Plus how-to video, which normally only plays once when you pop the game in for the first time, after playing a WiiWare/VC game off the SD card. With Resort's US release mere days away, it appears the regions won't be bothered too much.