From an interview with the Forza Team in 2004!
http://interviews.teamxbox.com/xbox/873/Forza-Motorsport-Microsoft-Games-Interview/p1/
Forza: half of gamers can't pronounce it, and the other half have no clue what it means. Enlighten those who need to brush up on their Italian with the proper pronunciation and definition.
Garrett Young: We were looking for a name that spoke to the sexy Italian styling of so many of our cars. Roughly translated, "Forza" means, "be forceful." The thing that really struck us is how the word is used at Formula One races in Italy: "Forza Ferrari!" is a common chant from the home fans as Michael Schumacher passes in front of the crowd. We run a risk by using a word that few people in the U.S. have ever heard, but we know the insiders will get it. And for those not fluent in Italian, it's pronounced "Fort-za."
starcraft: "I and every PS3 fanboy alive are waiting for Versus more than FFXIII.
Me since the games were revealed, the fanboys since E3." 
Skeeuk: "playstation 3 is the ultimate in gaming acceleration"
