iPod Nano - Smaller, more capacity, and cheaper
6G iPod - I don't think that spy shot is the Nano. I think it's the new 6G iPod. More capacity, cheaper, thinner.
iPod Touch - New model with touchscreen, Safari, Mail, Google Maps, YouTube, 3 1/2" multi-touch screen, no click wheel, basically a phoneless iPhone.
Even though i don't think your solution is very likely to happen i actually would prefer it to any other.
The commonly expected scenario (iPod nano, iPod nano video, iPod touch) creates one problem for me: ALL these iPods are unattractive to iPhone users. Why would Apple want to lose iPhone owners as potential iPod buyers?
I myself will buy an iPhone as soon as it arrives in Germany.
Until now i used a iPod video and a iPod nano: the video for my
whole library. the nano for selected albums (favorites and new arrivals).
i took the nano for small 'trips' into town, university or similiar occasions (that is for listenig while walking, sitting in the metro) because its so small you hardly feel it in your pocket.
the video served as a backup of my data, longer trips (that is more than one day), for private parties (when i wanted all my music to be play) or if i had a handbag with me.
Now, if you own an iPhone it clearly makes an iPod shuffle or nano useless: Why would you want to carry a second device with you if you have the same amount of storage always with you.
But, supossedly the iPod 6G will be the rumored iPod touch: As an iPhone owner, why would you want to pay double for most of the features (WiFi etc)? Why would you want to carry 2 quite big devices with you that distinct themselves from eachother only through 2 features: one has a lot more storage, the other one can make phone calls.
I think Apple needs an iPod that is attractive for iPhone users: big HD (100GB) but smaller and cheaper than a iPod touch with wifi.
Just my 2 cents. Can't imagine i'm the only iPhone (pretty soon) user who thinks that way.
I also can't imagine that the iPod 6G will have superior features to the iPhone as wireless syncing or online iTunes store since this would take a lot of impact to the iPhone launch in the rest of the world; being already dated before it is even released.