I agree with others here that these days, I think most of us can find a pretty reasonable backup internet connection within our own cell phones. I have a company owned BB curve over the Verizon Wireless network which I occasionally use to tether to my laptop while I'm on the go. While I may only get a few hundred Kbps at best, this is actually enough to provide me with limited e-mail and internet access and sustain a CIsco VPN connection, all while I'm on the road (not driving myself of course

Now as a network engineer I of course expected to easily be able to use services such as telnet and ssh, but I was pretty surprised to see that I am actually able to sustain a few RDP sessions over this connection with reasonable enough performance to get all of my work done!