CNET tends to review products from the outside looking in (see Donald Bell's full review of the new Shuffle). But the good folks over at iFixit make it habit to start right from the inside. In the case of the third-generation Shuffle teardown, like with all recent iPods, Apple doesn't make it easy to crack the case. And although only one screw had to be removed, iFixit describes how it had to insert a "metal spudger into a crevice between the rear cover and the rest of the Shuffle" to get the device open. As you might expect, things are pretty simple--and tiny--under the Shuffle's hood.
"Have you disassembled the headphones with remote yet? Have you figured out, how the buttons work? Do they work by connecting two lines with a resistor? Is it possible to add such a remote to other headphones?"