One SIP idea using publicly-available data could be to research what affects go into a NBA career compared to a WNBA career. The affects i'm thinking of include: Marriages, salary, pregnancies, injuries, etc. I would try to gather information via the NBA and WNBA by website or by phone. The one big hypothesis i would like to test would be that the WNBA players have significantly shorter careers than WNBA players because of the many factors mentioned above.
Another SIP idea using original collected data would be to do an internship with a big company and survey their employees asking about their happiness and other factors within the company itself. I would test for the hypothesis that an employees happiness is based upon certain factors that would be collected from the survey.