I graduated a year early and started working for Microsoft almost immediately. Now, staring 30 in the face—having worked for a startup, started an angel-backed one of my own, and having recently joined another—I can happily reiterate what Brad is saying: follow your passion.
I am a little further away from graduation but it won't be long.
I am curious if you have experienced the same thing I have. I went to grad school to gain knowledge and answer a bunch of questions. While many of them have been answered, they have been replaced with exponentially more questions, many of which are even harder than the original ones in the first place.