best of luck to you! I would suggest continuing to work there while you look for a new job - knowing you're outta there soon should help the time pass. Also, despite your desire to vent and give them a peace of your mind, I would strongly advise you to smile and leave on good terms. You don't want to lose the reference, and it's a MUCH smaller world than people think, you never know when you may cross paths with some of them again.
For someone that Forbes magazine said is worth $10 billion i didnt think you stressed about stuff like this! Hope everything works out for you!