Quote:
In the comments section of his most recent post on the PlayStation.Blog, SCEA producer Takau Imasaki mentioned that in-game voice chat and a private race setting will be available for Gran Turismo 5 Prologue in later updates. Now this news comes in as semi-official as it was not part of the original post, but was made in response to a reader's question. Imasaki wrote, "Private races with buddies and in-game chat are all in the works... but will not be ready from day one. Will keep you posted on the progress!"
its probably waiting for Home to launch for integration me thinks, so Home does it for them.