The N series are pretty much a restyled 6680 with better camera, but the flagship N series does better video too and has a hard disk installed.

The 6680 allready has Slide N Shoot (instant camera & video) 3G, WLAN, stereo output, Blyetooth, life blog, N sensor, blah blah blah....

I seriously doubt anyone will be getting one of these N series phones without handing over a good few hundred quid.... so beware Kim.