I saw this yesterday on whdh.com, and just noticed wsvn.com has also added it.
Bascially it’s a link to traffic.com, with a custom header to reflect the station site you came from. It’s a flash map overlayed with traffic data. There’s also the Jam Factor Report /how clever/ where visitors can see almost real-time data of travel time major roads in South Florida
WSVN Traffic Tracker or the link on WSVN.com
NBC 6 has had traffic links with real time traffic for years.