In it, a whole bunch of info can be seen. Most importantly, the proposed chapter order for late 2002; seeing what chapters were still considered for the story; and various developer assignments, such as what prefab maps to work on.
The chapters listed are:
- Train ride : City 17
- Station
- Terminal Square
- Arcade (or other)
- Kleiner's Lab
- Back alleys/Factory
- Breen Plaza
- Sewers
- Canals
- Quarry
- Ravenholm
- Eli's base
- Junkyard or Wasteland
- Sub - Lighthouse
- Depot / (Train Ride?) / (Alyx + Train?)
- Air Exchange
- Borealis
- Kleiner's Lab - Redux
- Factory
- Breen Plaza
- City Streets & Museum
- Gate to Inner City
- Inner City
- Citadel
- Interior
Among other curiousities, it shows that the Airex and Borealis stayed relevant enough to be included up until late 2002; the WC Mappack's most recent Airex map is from February of 2002, and it is usually believed it was dropped in early part of that year.
There's also nothing between Borealis and returning to Kleiner's lab.
As noted by Marc, it also contains Viktor Antonov's 'trademark slogan', "This is bullshit". It is said to have been applied to everything "liberally and hilariously".