Facebook is actively looking for incredibly intelligent undergrad, grad and PhD students for full-time positions and summer internships. According to facebook "Because we’re growing so quickly, there is enormous opportunity for individuals to have an impact and to grow as our service and company grows. We've got 500+ million users so far, but we have so much more to do and build, and that's where your kung fu comes into play."

Visit http://www.facebook.com/careers
Visit http://www.facebook.com/careers/department.php?dept=grads

Facebook is now worth well over $50bn. Who would resist an offer to work in such a company?