According to Bluray.com the Blu-ray version of David Fincher's Fight Club will be coming out on November 17th. They have a scoop through The Digital Bits that details the yet unannounced special features of the disc.

• Four commentaries:
  • Director David Fincher
  • Fincher and actors Brad Pitt, Edward Norton, and Helena Bonham Carter
  • Novelist Chuck Palahniuk and screenwriter Jim Uhls
  • Crew (Alex McDowell, Jeff Cronenweth, Michael Kaplan, and Kevin Haug)
• Seven deleted and alternate scenes
• Featurettes:
  • A Hit in the Ear: Ren Klyce and the Sound Design of Fight Club
  • Welcome to Fight Club
  • Angel Face's Beating
  • The Crash
  • Tyler's Goodbye
  • Work: Production; Visual Effects; On Location
• Insomniac Mode viewing option
• Guys Choice Award
• Edward Norton interview
• Music video
• 12 TV spots
• Trailers (including the 8 Rules of Fight Club)
• Promotional and art galleries
• Internet spots

So it’s pretty much the same as the original US release of the DVD (the UK version only had Fincher's commentary). While this is a must-buy due to both quality and substance, I wish they did something more for the Blu-ray, maybe a new documentary or a couple of extra things they weren’t able to fit on the DVD.