updated 10:24 am EDT, Wed April 9, 2014
Program seems to be in testing, wide deployment unknown
Apple is in the process of testing a new Maps error-reporting feature. Reports are surfacing that when users note errors in Apple's Maps iOS app, they given the option to receive a push notification when the error is rectified. Implementation is spotty, but has been reproduced in part by MacNN.
A user at MacRumors had reported an error to Apple on April 6, and was given the option to get the notification. Apple sent a response, indicating the fix on April 8.
Perusal of online reports of the Apple Maps error-fix notification messaging seem to be limited to US users, where Apple's "Ground Truth" operatives are more prevalent. There are no indications if the feature will be widely deployed, or when implementation might be expected.