I don't really know if USB speed ratings apply to it, seeing as you just connect your camera to it.
Icruise, what do you know about this?
As for RAW files, the iPod can and will store your RAW images and sync them to iPhoto but will NOT display them on the iPod screen. Instead you'll just see a cute 'lil "RAW" icon.
As for the camera connector in general, I have one and it's a very cool add-on to have.