http://www.nytimes.com/2011/02/17/te...me&ref=general

Until recently, only determined and knowledgeable hackers with fancy tools and lots of time on their hands could spy while you used your laptop or smartphone at Wi-Fi hot spots. But a free program called Firesheep, released in October, has made it simple to see what other users of an unsecured Wi-Fi network are doing and then log on as them at the sites they visited.
Without issuing any warnings of the possible threat, Web site administrators have since been scrambling to provide added protections.
I released Firesheep to show that a core and widespread issue in Web site security is being ignored, said Eric Butler, a freelance software developer in Seattle who created the program. It points out the lack of end-to-end encryption.
One million downloads. The fellow who wrote the program was from washington.