Internship Opportunities in Software Technology - Links
The general research intern page has pre-arrival info, relocation guidelines, a page on the housing program, etc.: http://www.research.ibm.com/interns/
IBM's Watson Research Center: http://www.watson.ibm.com/index.shtml.
The web page of the PL&SE professional interest community at IBM highlights some of our programming languages and software engineering publications and projects: http://researcher.ibm.com/view_pic.php?id=3