From a Verizon press release:

Verizon Wireless finds Tennessee customers as the 'textiest' customers for sending and receiving the most text messages per month, according to results from the company's "Big City Wireless Use Study."

The study revealed that Verizon Wireless customers in Nashville earned the number one spot as the states 'textiest city' with customers sending and receiving 819 million text messages from January to April 2008. Knoxville landed the number two position with over 420 million text messages during that same time period, while neighboring Chattanooga earned third place with 408 million text messages.

The "Big City Wireless Use Study" was initially developed by Verizon Wireless to compare the growth in text messaging from April 2006 to April 2008 in the Southeastern states of Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Texas and Virginia. The study revealed an increase in text messaging among the company's Tennessee customers by 520% in 24 months (April 2006 to April 2008).

Must be all that twittering. Verizon should pay Jack Lail a commission.