We can not estimate this new firmware update for the day, but at least to characterize the introduction, iPhone OS 4.0 is really coming, Apple has sent invitations to some of the media, inviting them to participate in Apple's forthcoming, entitled "sneak peek of the next generation of iPhone OS software "activities. Invitation in the blue background on the design of a big "4" reflection, covered by the "Get a sneak peek into the future of iPhone OS" in white font.
The conference will be held Thursday 10:00 EDT
Invitation