Were you thinking of using a Kensington lock to secure your laptop computer? You might want to reconsider.
Thanks to Boing Boing for this pointer to a demonstration of how to open a Kensington laptop lock with the cardboard tube from a roll of toilet paper.
Here is the two minute long, 7.5 MB WMV video.
Chris Vogel says: “That ‘gentleman in a 2600 t-shirt’ is Barry Wels, you can find videos of talks given by him (where he also opens various locks) here.”