When it's a webkey.
It's a dirty little trick! I picked up what I thought was a standard USB key from a vendor (COMMVAULT) at VMworld 2010. I recently had a need to have a few small documents on hand and thought I would re-use this device as a flash drive to store these docs.
I inserted the USB key into the USB port and waited while the familiar "Windows is installing the driver for this device" message popped-up. About 1 second after that, I saw the Start | Run window pop-up and it almost looked like someone was typing a URL in the text box and hit enter. Next thing I know I'm looking at Commvault's VMworld 2010 website.
You can learn more by Googling "webkey". This is basically a stick that when you plug it in, opens a URL. That's it. There's no flash memory on it.
Boo Commvault and whomever else is using these things. I mean really? Text or email me the URL, that will be much more handy. The Commvault webkey that opens a 2 year-old web site now sits in the trashcan. I give webkeys a big thumbs-down! Just a bad idea.