In America, back in the 60s, there was a board game called ``Hüsker Dü'', with the umlauts. It was basically a version of Concentration (where you have 25 or so cards face down, you turn one over, then have to find one that matches, removing them as you find pairs). This was sort of a pop culture reference to the guys in the band, and was where the name came from. I've heard other people from Scandinavia (I think there are very similar, if not identical, phrases in Danish and Swedish) claim that they thought the umlauts were generic heavy metal posing, like Spinal Tap (sorry -- there's no character for n-umlaut). Fairly recently, Pressman games started making Hüsker Dü again.