Could Apple have more technical surprises in store for the iPhone? They've asked the FCC to keep photographs and details secret for 45 days, so who knows? We've already heard about the 512MB of RAM hiding inside, but Apple is still playing it coy:

"Although Apple has begun to market the device publicly, these documents reveal technical and design information that has not been publically disclosed in such marketing and that is protected by Apple as confidential and proprietary secrets."

Speculate away. Come next Thursday, there ought to be tear-downs aplenty to find out.