“The Gates” might have New Yorkers all abuzz, but you might excuse the state of Colorado for wondering what happened to their Christo/Jeanne-Claude project. “In the “artworks in progress” section of the artists’ Web site, the only project listed besides ‘The Gates’ is ‘Over the River,’ a plan to suspend several miles of shimmering fabric panels above a stretch of the Arkansas River in Colorado during a summer.” But ever since The Gates hit the front burner, Colorado hasn’t heard a thing from the pair.