I first read about it on a fermented foods website. Then I met a local guy who actually imports the stuff. Dirt cheap! They use it for agriculture mainly, but it's starting to make inroads into the local health market. I actually want to try ferment my own, but for now I'm just purchasing starter and drinking that. Apparently it's a pretty awesome product. But I've only heard good things about kefir too. I must try get my kefir in somehow. My new plan is to ferment freshly squeezed tomatoes with kefir grains and drink that. Low sugar, so it shouldn't get too alcoholic. I used to ferment commercial tomato juice, but it's always mixed with salt and the salt ended up really hampering the development of the microflora and eventually the grains seemed to basically die (still alive, but struggling).
I want to try make kraut using both kefir grains and EM starter.
I wish I could get grainfields here. I know some people in oz, maybe I'll organise some some time. I'd actually prefer to get grainfields products than their starter culture. Looks amazingly healthy