From http://en.wikipedia.org/wiki/Poker_S...nal_Tournament

Todd Brunson
Mike Caro
Johnny Chan
Antonio Esfandiari
Chris Ferguson
Ted Forrest
Barry Greenstein
Joseph Hachem
Gus Hansen
Jennifer Harman
Phil Hellmuth Jr
Phil Ivey
Erick Lindgren
Mike Matusow
Chris Moneymaker
Daniel Negreanu
Greg Raymer
Mike Sexton
Mimi Tran
Cyndy Violette

Which means that there are four others involved although no one seems to know exactly who.

As for whether Matusow won or not, I noticed at the Full Tilt Invitational, they said Matusow had won $2.5m in tournaments this year.

$1m - WSOP ME, 9th place
$1m - WSOP TOC, winner
$500k - ? (but could be PS3)

Cheers.