I believe that Apple will launch an iPhone nano with the form factor of an iPod nano (if not next Tuesday, then soon). The reason I think this can work is because of what Steve Jobs said at the 2007 original iphone launch that each new "revolutionary user interface" they have created "makes a new device possible". The nuance/Siri assistant in iOS5 is what I think Apple will refer to as their next "revolutionary user interface", and the iphone nano is the device that is made possible. Voice assistant will be great on iPod Touches and the iPhone 5, but that's not why they're doing it - this will make a device with a tiny touchscreen usable. When I saw the invite to the event, the 2x2 layout seemed too coincidental to be true. The other thing that is required for a (presumeably) low-memory device like the iPhone nano to work is iCloud, and that is also being launched on Tuesday. It's still a long shot I know, but I'm hoping I'm right on this one.