I worked for a wireless ISP for a while. You have about a 2 mile range from the tower. Places like T-Mobile sell cellular access, which you will rarely if ever get above 28.8 kbps. On a fast wireless server (500K,T1), if you can't visibly see the tower, there is no connection. Also, they're RARE. I believe there are only 3 or 4 in OHIO and only 1-3 towers each.
