Twenty years ago, a friend of mine pointed to the rusted and abandoned elevated railway bed in Chelsea, which I’d barely noticed before, and proclaimed: “There are a couple of real estate bigshots fighting for that – it’s gonna be valauble some day.” That day has come, but not in the developer-oriented vision my friend once had. Friends of the High Line, which is redeveloping the old passage for open space and limited mixed use building, is planning to hold the first Highline Festival this May. Chairman? One David Bowie, newly sixty and readying for a public celebration of that advanced age. Apparently, he found his glam venue. Fred Wilson has some details. Will this become a permanent part of the New York festival scene?