Cisco

Great pay for an internship, and great experience if you end up in the right group. San Jose's a nice area to live for the summer, and the other interns there are good people.

The learning curve when you join makes most of a three-month internship dedicated to figuring out what's going on in the company. I'm sure this is pretty common across companies this size.

The intern experience can vary greatly depending on what group you end up in, and there's no way to know this beforehand. Some groups will have you doing real work, while others won't.

Try to make sure managers have a plan for an intern before they join, to ensure that they will actually be doing something over the summer.