In "A Brief History of Time" Hawking discusses that while it is impossible to travel in normal space faster than light, it may be possible to use wormholes, or to warp the fabric of space and time to achieve the same result.
i.e. if I go 10 miles in 10 minutes, you can say I was going 60mph, no matter how I got there. If I drove, then my real velocity was 60mph.
If I somehow managed to fold the road so that the start and the finish line were only 1 foot apart for the time I was travelling, at which point the road unfolds to its previous state, then I could get there in the same amount of time by going 6mph. But the time/distance equation still works out to 60mph from my perspective.
And yes, I know this sounds astonishingly close to the way Star Trek says its ships fly. But then the book that explains how they fly (Star Trek TNG Technical Manual) was published AFTER Hawking's books, so where do you suppose they got it?
Interesting footnote. Hawking appeared on an episode of Star Trek several years ago. As he was getting a tour of the set, they went by the engineering set. He looked at the warp engine and said "I'm working on that."