ABC has officially named hottie Elizabeth Vargas and, um, the neatly coiffed Bob Woodruff coanchors of World News Tonight, for which they have been the primary substitutes since Peter Jennings vacated the post months prior to his passing. The Eye Network, meanwhile, is still angling to steal Today's Katie Couric to front CBS Evening News, provided that she somehow can come away unscathed from Macy'sM&MBalloonGate.