Everything Old is New Again?

Over at Slashdot, they have an article on a new form of wireless hijacking.
They’ve written an applet to sniff wireless traffic and replace specified responses with their own content. So when you pull down a website it is replaced by something else.
In theory its similar to a man in the middle attack, but its more interesting because it is grabbed out of the air.
Their writeup is here. I’d highly suggest not following the links to images or videos on that site.