I'll just post all the information from my old online thread in this one, and just hope this one actually gains some traction.
So below are a bunch of screenshots and information about GT5's online mode, plus some new(ish) screenshots of the game,
Rough contents of the first screen:
Event Settings:
Private/Password
No. Laps
Time Limit/Penalties ???
Fine Weather ???
Voice Chat
No. Peers (8 players + director mode)
No. Players
Regulations:
Specific Car/Manufacturer/Region
Drivetrain
Displacement
Performance Point Limit
Power Limit
Weight Limit
Physics (Standard/Professional)
Tyre Compound
And some new screens, the last of which shows a seemingly much improved tarmac texture:
And now a biggie:
And the Toyota FT-86 G SPORTS Concept Trailer in HD straight from Polyphony:
http://www.gran-turismo.com/jp/news/d8893.html