OK, Google, we'll see your free WiFi plans and sort of match you maybe, says Yahoo. Yahoo Testing Free Wifi Product from TechCrunch covers Yahoo running a survey about giving people free WiFi access to reach Yahoo Messenger and a $7.95 per month plan to hit the internet overall. Hey, I'm ready to sign-up! Sounds like a nice, cheap backup for when my EVDO isn't working.
Postscript: Gary Price reminds me that Yahoo has already been offering free wi-fi in some hotels. More in Yahoo Sponsoring Free Internet Access in Two Sheraton Hotels.