"Piano Tec", by Uli Teichmann. A slowly drifting cloud of almost-nothingness, this track reminds me strongly of Eno's "Music for Airports", especially its crucial track, from which so much else has followed, "1/1". I don't usually like things encroaching upon the music that I hold closest to my chest, but for something this lovely (it also, and not unrelatedly, evokes Harold Budd at his most languorous) I am happy to make an exception.
This was actually the lead-off track on Kompakt's "Pop Ambient 2006". In case you weren't looking, a slew of Kompakt releases have just appeared on eMusic, making the 75 downloads a month suddenly appear to be a rather small number.