* TODAY IN OC LIVE!: Just what is that huge, fortresslike building that has sprung up on the edge of the UC Irvine campus? On Sunday, the $17.6-million structure that is the Irvine Barclay Theatre will be unveiled to the public. Times staff writer Jan Herman takes a sneak peak and talks to Irvine Barclay President Douglas Rankin about plans for O.C.'s newest performing arts center.