Starbucks has partnered with the T-Mobil service and its expensive for the limited coverage areas it offers. Supposed to be available in some major airport lobbys as well. Our sales folks use this.
But while we are on the subject of war driving and borrowing someone elses bandwidth, I am mentioning some things below as a tip should you buy an access point and want to protect your WLAN from free riders or hackers.
Its no secret that 40 or 128 bit WEP is pretty minimal in defending against war drivers, but there are some other features in AP's that can add an additional layer of security to WLANS.
A lot of AP's use MAC filtering so that only registered MAC addresses can associate with the AP and are allowed connectivity. I've heard of Linux based software that can sniff a MAC and then spoof it (like WEP encryption keys) to gain access to your WLAN but that's far more work than most punks will want to go thru.
You can static IP your private LAN and disable DHCP; not a chance in hell anyone is going to be able to "guess" your private WLAN segment unless you are so naive to leave it as the default 192.168.0.X.
That's one of the biggest issues I think, is to not leave anything as default including enabling WEP encryption. Dont leave your WLAN name as the default "101" the war driving kiddies will try that one first. Change the admin password on the AP you use as its easy to pull up manuals on the net and get the manufacturers default passwords.
We use WLAN in some of our offices and we incorporate the VPN as an additional layer of security. The WLAN is live and connected to the internet but is isolated from our production network. It seems like a long way to go from the mobile laptop, to the AP, to the ISP, and then connect via VPN back to the production network, but the speed is satisfactory and it is secured.
Plenty of WLANS to hack out there where the uneducated or uninformed public will will simply "plug and play" these AP's. These folks will help feed the likes of those simpletons with a car and a wireless laptop with a Yagi antenna running AirSnort. It would be quite another matter to hack thru a VPN as well.
Jose - let me know if you still want that card - ck your email I left you my home number there