although collisions with other racers would be cool, i don't think its going to happen, there would have to be a say.....8-10 people per server limit on players,lets face it, the track isn't exactly wide, can you imagine joining a 100 slot server with collisions on

you would have to be the luckiest git in the world to even finish with a respectable time,
the editor needs work, i would personally like to bring the bricks from the island environment into the stadium environment, when jumping from a half pipe to a half pipe the landing is so much smoother than stadium, the island loops and walls and the corner wall/loops would be a great addition, because i hate having to race a track that has the awkward transitions from loop to loop in stadium, if you not got the line right you can easily lose up to 1 sec per transition