Unless Microsoft's playing a nasty trick on its loyal fanbase, the latest Zune newsletter confirms a feature-laden software update, very likely what we've been calling Zune 4.0, is due out on Tuesday, September 15th, the same day as Zune HD takes its place among its fading peers. "All-new Zune software packed with exciting new features," you say? We'll be looking forward to more HD video options and an apps marketplace, all the
