Americans pronounce zeta as "zay-ta", just like beta (bay-ta) and theta (thay-ta). Just another example of two peoples separated by a common language."The British and others pronounce “z”, “zed”, owing to the origin of the letter “z”, the Greek letter “Zeta”. This gave rise to the Old French “zede”, which resulted in the English “zed” around the 15th century. "
In America you say Zee in Canada we say "Zed eh" as in: "I got a fine Niikon eh...."
Since we appear to have a sense of humor in this odd debate..