I always had the sneaking suspicion that TechTv's Michaela Pereira was busty, but she was always behind a desk, or banner. Then one time she stood up and walked around to demonstrate a flatscreen tv or something and IIRC, she was packin'. I can not find any pictures online to support that though.
Also, I think Rita Cosby is quite voluptuous. She used to be on Fox, now she's on MSNBC I think. Her weight fluctuates, but at her heaviest she had quite a set of lungs and hips.