I'd go with kah-tah-REE-na just talking about the name, because the only context that I ever say it aloud is in reference to my great grandmother
Catarina, who was Italian.
On an American kid, I'd say it kat-a-REE-na off the bat if I was, say, reading it from a list or something of that nature. I'd feel like a tool for affecting a foreign pronunciation in that context unless specifically told otherwise.
This message was edited 2/12/2008, 1:54 PM