WRG-TV 5 Memphis, TN still has Weather Plus, but it is not as reliable since NBC discontinued that service. It only displays a national doppler radar feed as well the temperature. The only thing local that it displays in the doppler.
Since the thread is bumped now, I'd better chime in. First off, where are you getting this info? At the time, it was WMC-TV that had WeatherPlus, not WRG.
We don't even have a WRG. We do, however, have a WREG which is the local CBS affiliate. It was also much more sophisticated then what you were explaining. It was in pretty bad shape, but not as bad as you lead to believe. It showed temperatures and radar, as you stated, but also showed airport delays, radar/satellite, travel forecast, and a few other products. It also had a problem with the current conditions on the left side, as no icons were present, and never were to my knowledge.
In October 2011, WeatherPlus in Memphis was scheduled to be slated and replaced with BounceTV. A change of plans called for Comcast to move WGN to WeatherPlus' place. BounceTV was put on channel 906.