Read this guys intership adventure with Microsoft, Google and Yahoo(his current job).

He also did a chart which i think would easily spellout where to go if you are looking for a place to go between the 3 giants:

I wish I had the chance to do what he did.. but hey! I had a great time at my intership too.. building Information Systems for a University.. it's not as advance at what he did but still pretty fun it you ask me :)