Since 2006, when Wi-Fi information and services firm JiWire proclaimed Wi-Fi hotspots had topped the 100,000 mark globally, the list of hotspot locations has continued heading skyward. As of March, JiWire reports there were nearly 250,000 free and for-pay hotspot locations in 136 countries. (That number isn't 100% all inclusive, but JiWire's registry is likely the most comprehensive available.)
The good news for U.S. travelers is that more than a quarter of those hotspot locations are located...