Preview at WWDC likely in June, followed by September launch.
Photo of the 4th Generation iPod Nano?
Alibaba, a B2B marketplace, has a photo (via Zollotech) of what appears to be the 4th generation iPod Nano that is expected to be released next week.
We can't be for sure if this represents a photo of the actual device, or simply a mockup based on circulating dimensions, but it does show what appears to be a dock connector on the bottom of the device. The image also correlates with all circulating rumors about the new iPod Nano.
Apple will be holding a special event on September 9th where the new iPod Nano is expected to be released.