If the universe is expanding faster than the speed of light, and force carrier particles move at the speed of light, wouldn't this cause infinite universal expansion? Since no forces would be acting upon the outer edge of the universe? (This doesn't account for the apparent acceleration of the universe but it does account for the lack of slowing down for the universe).
Not quite. When people make statements like 'universe expanding faster than the speed of light', it refers to two different regions of the universe separated by some large distance. For a given location in space, there will always be a nearby region that is moving away slower than the speed of light---which it interacts with.