I'm sorry you're still in the hospital. My intestines didn't wake up for 10 days after my ileostomy surgery. I was vomiting, too, and had to be on an NG tube.
Make sure they don't slow down your IV fluids when your ileo starts working. They did that to me, and I ended up severely dehydrated and had to go to ICU for a couple of days.
Good luck. I hope you start getting some output soon!
Dx'd Crohn's in '99 at 28. Proctocolectomy and ileostomy in '06.
Disease-free, medicine-free, and very thankful to be healthy again :)