If you should find any stale links or other such nonsense, please email . The page is not an absolute indicator of open or filled undergraduate positions in participating laboratories. The preferred method of contact for most professors is E-mail. Do not send a general E-mail to more than 3 professors at one time. Contact each one individually.
Time is valuable.
With the first email you send professors, please tell them as much as you can about your qualifications, your past courses, your experiences, whether you want course credit, whether you want to be paid, and motivation. It's competitive, and you need to take the time initially to get as much information about yourself to the professors. A research position is contingent upon an individual interview, usually during the professor's office hours. If you have time, take a look at professors in other departments. For example, there are members of the physics and mathematics departments whose focus is biologically based.