Google and Earthlink have teamed together to offer a wifi network throughout the San Francisco area. Google can't do anything without causing worry about privacy among some. The concern with this initiative is that now Google will not only know where you've been online, but where you've been in real life. Interestingly, most commentary is not about whether Google knows, but the fact that they'll retain a handy drove of location information that may be of interest in law enforcement and PIs. See: Boing Boing: Privacy worries over Google/Earthlink WiFi plans in SF. See also a fair amount of coverage in the traditional online media.