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Any object that is beyond the horizon distance of the Local Universe will, by definition, be traveling faster than the speed of light w.r.t. our local reference frame. However, once enough time has passed and the horizon distance has increased in size, we will begin to see those objects as they were when they emitted the light coming to us at that particular point in time (when the horizon distance has reached them). Or, in reference to a ship traveling at warp speeds, you would see a mirage like effect where the light trailing the ship....effectively the ship's image....would eventually catch up to where the ship stopped. It would have to be slowed down, of course, as you wouldn't be able to see it otherwise. It would happen too quickly.
What they (cosmologists) are trying to say is that the reason why gravity is so weak compared to the other forces, is that most of its strength is being bled off into higher dimensional space. They theorise that it all depends on the geometry of cosmic strings w.r.t. to M-Brane Theory. If you consider that the universe we live in is the surface of a large, multidimensional object called a brane, then it's how the cosmic strings interact with the brane that determines whether gravity leaks away into the higher dimensions or is trapped within the brane itself. It depends on the geometry (shape) of the strings and how they attach themselves to the brane.
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