Jenn,
I am SO sorry that you had this awful painful crash!!!
I am so glad that you did not get run over.

I think people are thinking the van was driving down the bike path. Correct me if I am wrong- but I read it as the van was driving down a parallel road and then turned and without warning CROSSED the path right in front of you on one of those places where roads cross over bike paths. Is that correct?
I think we were kind of discussing this sort of thing (cars turning in front of you without signalling) on this other thread just a couple of days ago:
http://forums.teamestrogen.com/showthread.php?t=15367
May I suggest a book to everyone that I read early in my biking that totally changed the way I ride? The Art of Urban Cycling
It deals in depth with cycling techniques that may help us all avoid potentially dangerous car encounters. It's not not about city riding, but about all riding that involves any traffic flow, car, and dangerous street debris hazards. It's an amazing book that really made me ride differently.

Jenn, please heal soon with minimal pain- we are all rooting for you!
So good that you were wearing your helmet.
Did your bike get damaged, by the way?
You WILL be back on your bike again.