It was briefly mentioned in the front few pages of CVG some time before Christmas. The article was about the NGage it also briefly mentioned the Zodiac too.
i first learned about it when i was researching buying a gba and F2A.
then my brother read about it in fhm months later and told me to buy it so i did!
From the neo-geo.com forums, I think. When it was first released some board members bought up a unit and wrote a small review. It looked really interesting, but the NGPC and MVS were my main concerns at the time.