I just got my latest email from the High Line folks, and there were some photos of what's happening in Section 2. It looks very exciting. Above is a photo of a construction worker cutting through the concrete for the 30th Street Cut-out. Below is a rendering of what its going to look like. Here's what the High Line folks have to say about it:
Construction on the second section of the park, from 20th Street to 30th Street, is progressing on schedule, with planting set to begin this summer...The removal of the concrete [in the 30th Street Cut-out] will expose the High Line's steel framework, while an elevated viewing platform will bring visitors in close contact with the steel beams. Design by James Corner Field Operations and Diller Scofidio + Renfro.