The Human Computer Interaction Graduate Program at Iowa State University hosts a summer Undergraduate Research Experience, sponsored by the National Science Foundation. This is a ten week internship where students take short courses in HCI and work in interdisciplinary teams on research projects. Housing and meals are provided, as well as a stipend. More information about this program can be found at http://www.hci.iastate.edu/REU/
The application deadline is February 15, 2009.
Note that the program starts May 27, which may cause a problem with your spring courses.