We could go cheap here and talk about Yarbough's being the Foxy Brown of local TV news. But we won't sink to that level. TV news is a serious business, and Yarbough is a serious journalist. Last fall, for instance, she was a "celebrity judge" of a reality show called America's Most Eligible. There, she bore the critically important responsibility of determining whether any of the contestants was "the next big thing." And she is one heck of a news personality, highly professional and smooth as silk. She's the finest anchor out there, and even at 39 years old, she's still soothing to the eyes. But the window is beginning to close, people. At this late date, she's the little-watched 5 p.m. anchor (and she also does the 10 p.m. news for NBC's sister network, the WB, on Channel 39). Somebody has got to wake up and see that Yarbough deserves the 6 and 11 slots. She's prime-time, baby. The judgment is in: Yarbough is the next big thing.