Ben & Jerry's announced last week they have created a new frozen yogurt to honor NBC's 30 Rock, which aired its season finale last Thursday.  Liz Lemon Greek Frozen Yougurt, which features a blueberry-lavender swirl, will hit stores this spring.  Proceeds from yogurt sales will go to the Jumpsrat charity, a Tina Fey-supported education organization that serves children in low-income neighborhoods.