BoingBoing has the terrifying news for those who frequent free wi-fi coffeshops and the like, that a Firesheep user can easily TAKE OVER YOUR BROWSING SESSION.
(This means you, Anthony! Next time you hit on that barista, she may take her revenge by emptying your bank account….)
Read the article ASAP, and then follow its instructions at the end to secure your browsing.
…or, you can quit playing with baristas and the like, and pay for a broadband card for your laptop. Such connectivity is WAY more secure than any wi-fi security will ever be.