Wow thats depressing.
I just graduated last year and the area which I felt was most lacking was low level programming skills. For my OS class, it was all theory, no practical. So I'm now reading a book on the linux kernel to try and understand it a little more.
Our compilers class was a joke! Write a compiler based on c#! What! How does that make any sense?! I'm currently working in a company that writes web apps, which is fine, but I could learn this stuff any time.