Last week, without fan-fare, AT&T turned on 3G coverage in the City and surrounding areas of Cookeville, TN.
I can confirm that the coverage along i40 stretched between mile marker 277 west of the city to 290 east of the city.
There is also coverage in Downtown Cookeville, the Tennessee Tech Campus, and the business and residential areas south of downtown to i40. There is a strong indication that Baxter is also covered, but this is unconfirmed.
The AT&T coverage maps do not as of yet show this, however a resent coverage update now shows 3G in the extreme east of Cumberland County, a fact reported here some weeks ago.