He is currently in intensive care in an induced coma. He lost his right eye and suffered brain damage.
His wife Katie "is about to give birth to their first child," one floor away, according to this CBS News report.
Update: Katie, 21, just gave birth to their first child. Snip from Reuters update:
Katie Medley and her husband, Caleb, both wearing Batman apparel, were at a showing of "The Dark Knight Rises" in the Denver suburb of Aurora when a gunman clad in tactical body armor, helmet and gas mask opened fire during a midnight showing early on Friday. Twelve people, including a 6-year-old girl, were killed and 58 wounded.
Caleb is currently listed in critical condition at the University of Colorado Denver Hospital. He is showing some signs of progress. Like a number of people injured in the Aurora shooting, he is uninsured. His family has been told that the cost of his medical treatment may exceed $2 million.
There's a fundraising site here, where friends and family are gathering donations to help with his health care costs. America would be an even greater country if people didn't have to do stuff like this to get life-saving medical treatment.