Flickr user sjwalsh384 has a neat Dvorak keyboard mod for the MacBook. Apparently fond of the alternative and supposedly faster Dvorak keyboard layout, he rearranged the key caps on his MacBook (their square shape makes this relatively easy). He has some photos on flickr documenting the process. Worth a look if you're a Dvorak fan or just want to know what the back of a MacBook key looks like, but you're too chicken (like me) to pry one off.
[Via Digg - thanks to those who sent this in]