[smidwap]

Yeah like Zev said know something before you get there, but expect to rapidly learn new technology at your internship...that is the best way to impress and push forward in a job. I was hired a couple years ago to work on a company's employee portal, which started as sort of a joke because it was so rudimentary, but I learned the insides and outs of the existing software and quickly learned how to hack it (without using any real programming language). Within weeks my boss had me doing complex work flows/applications on the portal and paid me a pretty penny for it! Every internship will be different, but just try to be flexible with what you're given. My guess is this is what will impress potential employers the most, especially web startups looking for individuals who can think outside the box.

The interviews were actually slightly intimidating because most of the applicants knew more programming than I did! Cool experience though :)