yes
I actually think an iphone nano could be in the works.
This is how it would work
Apple itablet media device, 8--10" touchscreen device running iphone OS, or a lean version of the OSx.
This device would HAVE A SIM card for 3G data and phone usage. I know, I know what you are thinking, I don't WANT to carry my damb tablet around with me for a phone....
well, this is where the iphone NANO would come in, it would be a COMPLIMENTARY product, just for phone, light email and some apps. It would carry a DUAL SIM like we have in the REST of the world and it would RING TO YOUR SAME number. It would essentially BE your same number.
At home, or work, you can use the media tablet and answer calls, do video conference, use a headset, bluetooth, etc.
When you go mobile, you simply take or pickup the iphone NANO instead of the larger device.
This would require the carrier AT&T to offer the dualsim technology (which is already in the network but not available) and charge an additional monthly fee, like 10$ for it.
This would be a way for AT&T to hold onto SOME sort of lock, feature lock to customers when the current AT&T contract ends next year.