Some links I promised to send to my friend Erik who is an Electronics/ IT Geek among other things:
Slashdot article about Hardware Hacking.
But this story about the Linksys NSLU2 is the actual example I mentioned.
And now for something completely different: In-ear headphones.
My boss has the Etymotic Research ER-4S. Says they are great, especially for airplane flights.
I have the Sennheiser HD25-1s. One advantage of them is that people actually see that you're wearing headphones and should not be surprised to notice that you can't hear what they're saying. (Although, surprisingly, a lot of people are!)
Last but not least: Great Hackers!
Did I forget anything?