http://www.unmc.edu/dept/pharmacolog..._ID=8&CONREF=7 http://www.unmc.edu/dept/summerresea..._ID=1&CONREF=1
A couple at the University of Nebraska Medical Center (so you know it's biomedical in nature) in Omaha with available summer student housing...
Typing "summer undergraduate research" into google kicks up a bunch of results as well