According to a set of documents supposedly leaked from a game marketing site over the weekend, racing game Forza Motorsport 3 is in development and may feature 400 cars, 100 tracks and will ship on two discs. If it pans out, the game will will allow for robust customization and a full suite of online capabilities, including something described as an "assist system" to "allow new players to get into the game quickly."
Most importantly, perhaps: "Real World Damage" was mentioned, meaning that if this pans out, you'll be able to crash your car and have it dent, the lack of which is a pet bitch we have with many racing games.
(The above pic is from Forza 2, and isn't part of the leak. We just like pretty cars.)