last usa figures I saw still had Fundamental selling fewer copies than Disco 3!
Its gotta be close to Gold (100k) in the UK by now, but selling only a handful of copies a week is going to take a decade to get that elusive gold cert from the BPI.
Worldwide, from all the wild and wonderful estimates I've seen, optimistically i would only put it at 750K right now. But who cares, the tour seems to have been financially very succesful.