Well, the FCC documents for the iPhone 3G are out. Do you see any specifics? They would have to be mentioned, otherwise it's just a pipe dream.
I will look over them now.
However, I don't believe that a camera would have to be reported in an FCC document, as it's not transmitting any radio frequency. Any "video chat" would be done over the 3G or WiFi chip that the FCC already approved.
EDIT: The FCC filling DOES include the following statement:
"Apple requests that the Commission withhold the following documents from public viewing for forty-five days after the date certification is granted:
- Exhibit 1: Test Setup Photographs
- Exhibit 2: External Photographs
- Exhibit 9: User Manual
Although Apple has begun to market the device publicly, these documents reveal technical and design information that has not been publicly disclose in such marketing... Apple believes the period of confidentiality requested is necessary to protect the information until the commercial release of the device."
EDIT 2: Upon full analysis of the FCC document, I see no direct reference to a front-facing camera. However, there also does not appear to be any direct reference to a proximity sensor, ambient light sensor, or accelerometer. The only reference to the back camera is a circle on a drawing of the back of the iPhone.
I think it MIGHT be plausible.