Online resources include: NSF REU:
Research Experience for Undergraduates funded by the National Science Foundation.
Is generally held at research-oriented institutions such as Duke, Rochester, Purdue, etc., and is
usually for upcoming juniors and seniors only.
Several other sites that are great resources for both research and industry-oriented information:
For traditional BME's this SITE has 75+ links to other Internships for the 2007/2008 year.
For pre-med BME's this SITE also has many links to other Internships for the 2007/2008 year.