Nevermind if a facehugger can hug a Jockey... From the film it is obvious it can.
But what about the resulting alien? What would a jockey alien look like? My theory is that it would be much bigger than the aliens we've seen, possibly even bigger than a Queen. Yes, I know there is no evidence to support this.. but wait until we see the Predalien. If the Predalien is much bigger than the other aliens, than the Jockey alien would be too, logically.
Now I want to see Jockey Alien VS Predator.