I may be grossly oversimplifying this but I have always wondered:
Lets say the edge of the universe is expanding at the speed of light, and the Earth resides at an arbitrary point, lets say half-way to the edge an is therefore moving pretty fast. Stuff on the other side of the universe could have a relative velocity of greater than c to the Earth, hence from our point of view measuring it's recessional velocity it could appear to be beyond the speed of light. Or perhaps since we're receding faster than light the light will never reach us, implying theres a lot of the universe that cannot and will never be seen.
As I say thats probably an over-reduction of the situation, not allowing for relativistic weirdness, but I have always wondered about it. Can anyone set me straight?