I've heard of it but I'm starting to get more and more skeptical about exactly whether these super-antioxidants are really improving us physiologically.
And you are right, it does seem like a new super-berry is discovered/highlighted every few years...Acai berry, etc.
Appears your Maqui berry is 3 times the antioxidant value of the Acai per the ORAC test. Interesting, but I'll wait to see if any legit studies come out. Marketers are getting VERY clever these days. Watch your wallet.