First off Weltall, gravity does affect time. Gravity affects almost everything like Bossieman said.
I have some interesting diagrams that was given to me by an MIT professor, he explained all this to me a long time ago, I could barely understand him, but it was enough to open my mind...
Bossieman\'s explanation is missing a few key points, but Im sorry, I don\'t know them well enough to explain them. I will try and find all my notes on this subject this week....
And for Megiddo... You can not go faster then the speed of light.. Well not at least right now, maybe someone someday will figure out an equation, or some equation to bend around Einstiens, but not today..
Here is very very basic statement... When mass accelerates toward the speed of light its mass increases. So they closer you get to the speed of light the more and more your mass will increase.. So at some point you mass with reach infinite mass, and it will take infinite amount of energy to accelerate you. This Eintsien predicted and this has now been proven.
If someone figures a way past it then great, but right now, in our life time I doubt we will ever see anything go past the speed of light...