Nope - not even remotely i am affraid.

There are the random missions - but thats it.
Those are the same as always - available on jobs boards etc. You CAN join up by grouping with other players to tackle these types of missions... but no storyline stuff. Imagine it though - 20 players joined in 5 groups all playing the storline as Trent at the same time on the same server......something would catch on fire.