If you have AT&T DSL you may be able to get free WiFi Hot spot access to use with your iPhone.
http://www.anyiphone.com/2007/07/03/free-wifi-access-for-att-broadband-customers-for-the-iphone/
http://www.anyiphone.com/2007/07/03/free-wifi-access-for-att-broadband-customers-for-the-iphone/