I just found this place and it's terrific. Order the Wasu "treasures" you won't believe it. 13124 Jamboree Rd, Irvine, 714-665-3338. I've never had "specials" anywhere including Matsuhisa like this. Reasonably priced too.
Kombucha is all the rage right now. Though the fizzy, sweet, fermented tea has been around for at least a couple hundred years (and possibly much longer), it seems like Americans and Europeans are just beginning to discover the probiotic benefits.