Eurogamer has the Gran Turismo 5 patch version 1.01 details. Available now, for those that already have the game.
"The patch was 133MB and downloaded and installed in a couple of minutes. When the game booted, it then recommended a further install from disc which took about five minutes.
It unlocks open and private racing lobbies, community features such a meassage board, mail and gifts, Gran Turismo TV (a store for downloading video content - all free at the moment), the Museum (cards/photos about automotive history that can be traded) and a news service on the title screen."