Anyone know if time trials work cross-platform? I've been trying to search for it, but haven't found anything yet...

It does, my friend.
And I think there is a glitch where you can use the Code on both consoles (The same code).
Anyways, what is your top Time on edge?
56 seconds.

Ok. I think you answered my question, but I noticed that it's a bit vague, so I'll rephrase it.

If I get the game for the PS3, can the people on the 360 version directly compete against my time trials on the PS3?