A user on the MacRumors forums wrote Steve Jobs about the iPod touch’s incompatibility with games purchased for previous iPods and the inability to edit or add calendar items on the touch. In the response, Steve (or more likely, one of his assistants) wrote:
The inability to edit or add calendar events is a bug that will fixed in a future software update.
It is hard to understand how such a bug would occur, since the touch shares much of the underlying code with the iPhone. It is more likely that Apple realized that the intentional crippling of features in order to differentiate the iPhone and the iPod touch upset users. Whatever the truth may be, this is great news for iPod touch users, who had previously resorted to some creative methods to keep calendars.