If you're going to get into it, go the way of "continuous" brewing, as described here -
http://www.westonaprice.org/food-features/1742-continuous-brewing-kombucha.html - that's really the best way. And it works well. And YES, it's great for you! really really is... I love it. Of course, you can buy it, but at $4/pint, well.... no thanks, I brought my own.
A few other good sites, some intro, some not so (remember, there are many different methods, they don't necessarily mix, and MOST do not integrate the continuous method linked above so keep that in mind when getting information):
http://www.seedsofhealth.co.uk/fermenting/kombucha_howto.shtml
http://www.mothering.com/community/forum/thread/789879/growing-my-own-kombucha-scoby <--- I don't particularly like that site, but it's a very informative thread for Kombucha.
A good search will provide you with literally millions of hits. 99% are garbage. It's good enough on its own without all the BS voodoo mumbojumbo supermagicalness some idio - I mean, people - try to attach to it.
One thing you'll notice right away if you're prone to being constantly cold or chilled in the wintertime is that it'll make you feel WARM. A very good kind of warm. At least that's what the cold-blooded ladies say.
It's not fermented to a high alcohol like your beer or wine. In fact, the yeast convert the sugar into alcohol and one of the bacterial elements (acetobacter) converts the alcohol to acetic acid (vinegar) and several other pretty amazing compounds.... I guess the best way is to try it yourself... Of the many great things about
making it yourself, perhaps my favorite is that you get to control the taste. I like mine still fairly sweet with just the start of a vinegary bite, much like fresh cider that's starting to turn. In fact, if it ages too long (for my tastes) and leans more heavily toward a vinegar flavor, I mix apple cider in with it and >BAM!< take it up a notch! lol!
Long ago, my youngest sister told me: "You'd ferment a stick if you could figure out a way how." I was fermenting everything in sight. I had also made fuel ethanol and converted a lawnmower and 2 tractors to run on it; I had 2 different carburettors for each tractor, one for ethanol in summer and then the original carb's for gasoline in the winter. The lawnmower - well, obviously, we didn't run it in 7 feet of snow. That was many years ago, back in the early to mid-70's. I guess making Kombucha, and also making maple wine (coming from a tree), I'm as close to fermenting a stick as I'll ever get.
I say go for it, it's amazingly simple and the best part is, it's freakin' free. Well, practically. And it's like one of the original probiotics. What's better than having a farm that produces food for you? Having these little critters inside of you (hey, you drink
it, you drink
them, right???), making food for you; after they've made the good stuff for you, they keep on working to convert some of the otherwise indigestible waste products in your digestive tract into very beneficial and often lacking nutrients that your body is actually able to absorb. On a related note, look up "glucuronic acid." It has adsorptive (NOT "absorb," but "adsorb;" look that up, too!) properties and is relatively abundant in Kombucha. That alone makes it worth my while, even if I had to buy it.
Yeah, I get long-winded about stuff that I know is as good as this. Do it. You won't regret it.
- Tim