Sega has revealed at TGS that the Xbox edition of PSO is a lot better than it seemed at E3.
We now know that PSO for Xbox contains both Episode I (the original) and Episode II (what amounts to a sequel. It was previously thought to be exclusive to GameCube.)

Additionally, the game will support not only the Xbox Communicator for voice speech, but a keyboard peripheral for text messaging. Previously, Microsoft denied that a keyboard would ever be released for the system, as they intended to distance it from the image of a PC.

http://www.gamers.com/news/1241984