I believe I read a while that they demonstrated it in a synthesizer application at a music expo, and I've heard rumors that they are already used in some commercial analog synthesizers.
Audio-synthesis has been using these kinds of technologies for decades. Its not unusual for synth/audio-processor manufacturers to make their own custom ASIC's, FPGA's, even small-quantity chipfab runs, to provide their IP to the customer. Synthesis is very promiscuous in this regard; you can make sound with a surprising number of things in the universe.
I well aware of the prevalence of the technologies you list in the synthesizer industry, but custom ASICs or FPGAs are quite obviously not the same thing as FPAA.
