First things first, pull the plugs... 10 min job! See whats in there. It could be just a case of drain the oil out of cylinders, replace CCV, topup oil, done. If you werent going fast when it died, there's only a small chance anything has died in the engine - trust me.
Theres absolutely loads of other threads on this, and even a BMW bulletin... If there is any damage, it may be worth asking them for some pennies!
http://forums.bimmerforums.com/forum/showthread.php?t=1394054