Well just as the majority here figured, there was no iPhone nano released or even mentioned at all at MacWorld. It would seem that it was a completely baseless rumor. More generally, there wasn't really anything specific to the iPhone in the way of hardware, which seems to suggest that Apple is focusing on other aspects of the brand, and that the iPhone will remain as is for a while. It doesn't look like a 32GB model is on the immediate horizon either. So my advice to all those people who waited would be to quit wasting your time waiting and just get an iPhone and enjoy it!