The cryptic message in the forums here seem to spell out the following:
- Simultaneous worldwide GT5 release March 2010. (12 months - 30 days)
- 600 cars and 96 tracks, some of which are modelled from previous releases.
- Customisable user created tracks
- Multiplayer with voice chat, clan/team support
- Two versions to be released. One full version - more expensive, one cheaper, but able to download and customise what is required. eg Blu Ray/PSN editions?
- Another platform release - one that "has not been uncovered". PSP2 perhaps?