PokerStars is one of the largest online poker websites in the world. PokerStars'' runs satellite tournaments throughout the year with winners qualified to enter into the World Series of Poker. Its satellite tournaments produced the 2003 World Series of Poker champion, Chris Moneymaker, and 2004 champion, Greg Raymer. Those two are regular players on the site and also act as spokespeople for the website, as does 2005 World Series of Poker champion Australian Joe Hachem. The website was launched in September 2001 and is owned by Rational Enterprises, a Costa Rican company with headquarters on the Isle of Man in the Irish Sea. PokerStars has been the subject of financial media speculation regarding a possible IPO or merger with a publicly listed company. Analysts estimate its market value would be approximately $3 billion which would make the company one of the world''s largest privately held gambling companies. Around the time the U.S. Congress passed the SAFE Port Act, many websites immediately suspended business with U.S. gamblers, whereas others, including PokerStars, did not. As a result PokerStars overtook PartyPoker as the world''s largest online poker room at.