$3,000,000 is the top prize in the final day of Premiere Week 1 and the 2nd day of Premiere Week 2. It was not the top prize in Michele Falco's game, as she played for $6,000,000.
Matty picked case #23 as his personal case which contained the $3,000,000 on 2006-09-18. He didn't win it as he took a deal and sold his case for $675,000, making it the worst deal ever (A difference of -$2,325,000, would have taken his final offer to $1,600,000.)
Joe picked the $3,000,000 in case #24 on 2006-03-03.
Michele picked the $3,000,000 in case #17 on 2006-09-21.