Thanks for the sightings, folks. I was so happy when this grain became readily available. I first had it a dozen or more years ago at Coco Pazzo Cafe, when Tony Priolo (now of Piccolo Sogno) was working there. I had never had it before and went looking for it -- it was damn hard to find and very expensive in those days.
I called the maker of the farro sold at Costco (and, at considerably higher prices, at Whole Foods and even Jewel), and he said that Costco carries it off and on, in its typical "treasure hunt" system of merchandising. So buy it when you see it.
I've also found out about freekah, which can be made from any kind of wheat. It's traditionally dried/smoked over barley straw, because the barley is harvested before the wheat. Anson Mills sells a limited amount, which they usually make from emmer, strictly wholesale to chefs.