Days after confounding fans with a so-called "special announcement" that fell short of expectations, organizers have confirmed that Black Sabbath will headline Ozzfest 2004. The timing of the announcement comes as more of a surprise than the news it contained, since, for weeks, assumptions were high that the legendary metal quartet was on board for the trek. Last week, Ozzfest.com promised a big announcement on Friday, though visitors to the site were met with a message about an unsigned-band contest instead of the news that Ozzy Osbourne himself first hinted at in a radio interview in early April (see "It's...