Although there hasn't been any official word on the America's Cup website, Cupinfo.com and North American Sailor via Yachting World, are reporting that the 9th challenger is from Korea; the White Tiger Challenge - the White Tiger being the symbol of Korea.
White Tiger Challenge
The 10th challenger (?) is a company called Venice Challenge Srl, evidently also called Venezia Challenge. They have just filed their official Notice of Challenge so I don't know if that makes them #10 or #11.
Tomorrow is the last day for registration. I wonder if any other teams are deadline pushers, such as myself, and sign up tomorrow.