In Monday's Denver Post, Feb. 21, 2011, in the Business section an article about new dangers for internet users pointed out how easy it is for someone to hijack your computer use over a public WiFi connection. Only two browsers seem to be able to protect you at this time -- Firefox (see getfirefox.com) and Chrome (from Google). The Safari browser for either Mac or Windows or iPad does not offer any protection at this time.
For more information see this TechRepublic page or TechCrunch or Mashable. Search in Google for "Protect my computer from Firesheep" to find other methods of protection. Or See Walyou or eSecurity Planet.
You may be saying, "Why doesn't Al tell us the steps to take?"
Answer: the steps are outlined very well already. Go to one or more of the above sites by clicking, read, and act. If you need help, and live in the south Denver area, call me to come and do it for you.
For sure, make sure your home WiFi network (your router, usually) is protected with strong encryption and a strong passphrase. Change the name of the router/network.
If you can, do nothing important at the coffee shop. Don't check your bank, log into your email, or do anything that someone reading over your shoulder could hijack. The speed at which this hacking tool can grab your password(s) is amazing.
Use Firefox or Chrome wisely. Do not use Safari and do not use Internet Explorer. Mac users -- if you must use Safari invest in COOKIE (found in the Apple App Store for mac computers) and do the work setting it up to protect your personal and business data.
You can stay safe, but it's up to you. Over 105,000 people have downloaded this hacking tool. At least one of them may be near you in any public place.
I liken it to avoiding certain streets anytime, and other streets during certain hours of the day or night. It's just smart. But on the street you can take people with you. On the internet you are pretty much on your own. Be safe.