FON: free/cheap Wifi HOT or NOT?

"Web maverick shakes up status quo again: Skype and Kazaa pioneer Niklas Zennstrom pulls a promising new Wi-Fi startup out of his hat." He had 2 hits so far. Will FON be just as hot? Only time will tell but wifi network may have a potential. When I travel, I hate the hassle of using wifi at airports or hotels, so something cheap (or free) and easy to use would be welcomed. Unfortunately in the US just as cell phone coverage can be flaky, wifi is probably worse than cell. Sigh...