I was going to post up the same thing. I was pleasantly surprised to find 4G while travelling down I-40 around the Appling Road area. I had a good connection all the way past Baptist Hospital down to about Kirby Road.
Test Date: Oct 21, 2012 12:05:31 pm
Connection Type: Lte
Server: Little Rock, AR
Download: 5542 kbps
Upload: 4218 kbps
Ping: 80 ms
External IP: 66.87.18.10
Internal IP: 51.17.173.10
Latitude: 35.16942
Longitude: -89.85130