I'll take a day off if I have to: Jorge Cham, the creator of the comic strip Piled Higher and Deeper, is speaking at UC Berkeley on May 4. (For a while, he was also tentatively scheduled to speak at Stanford the next day, but that just disappeared from his web site.) It's the Dilbert of graduate school. If you've never been a grad student, it may not be that funny. But if you have, it is absolutely hilarious. Go on, procrastinate! You can't resist…