I'm not a Quark user, but I feel your pain; I've been waiting just as long for an OS X version of Coda Music's Finale (more or less the QuarkXPress of music notation & publishing). I hear Finale 2004 will be Carbonized & available this summer, but I'll believe it when I no longer have to boot into OS 9.
Meanwhile, next time I'm between projects I'll be trying out a demo of Sibelius (Finale's native OS X competitor)...Quark & Coda, don't keep us waiting too much longer!
Pete Sawchuk
QuarkXpress X: Five Years Later and Still Waiting