In case anyone's curious, the animated GIF in the header is showing a WASD 6-Key Cherry MX Switch Tester. I've found it useful in trying out the "feel" of different Cherry MX models. It's helped to translate the "key travel vs. force" graphs into the real-world.
It's available at http://www.wasdkeyboards.com/index.php/products/sampler-kit/...
[I'm not affiliated with WASD, and I'm not getting paid for this, although a discount code would be awesome! 8-)]