For some reason I'm having trouble figuring this out. What is the difference between the Apple Universal Dock and the Apple 3g dock? Also - for cases that are not sliders, like the Switcheasy Capsule Neo, how do you use a dock with these? The Neo, for isntance, comes with a Universal Dock Adapater - I assume that is to allow you to use the 3g in the Universal Dock? But does it dock through the case? Also - any docks worth noting out there besides the Apple ones?