at&t/Cingular roaming coverage dropped then reinstated

In areas of South Lake Tahoe and Kirkwood CA, at&t/Cingular dropped roaming coverage - then added it back - in the past week. Roaming in that area is courtesy of coverage provided by T-Mobile. This forum post (registration required) on Cingular’s forums shows how customers were able to voice their concerns with Cingular and get roaming coverage reinstated.