BEWARE, adding anything to your computer MAY void the warranty. proceed at your own risk. I have not brought my computer to apple after adding the button so I dont know if they will care that i added the button, and even if they said anything, the button pops right off. But be careful.
Also, I have tried other materials, but most allow the transfer of gestures from your thumb, through the material, into the trackpad. The plastic from the DVD case really works the best!

































simple + cheap = me. :)
if i could make one suggestion even though I'm not sure if this would help or not, i think I'm going to make mine a little less bigger than yours because its black color sort of overpowers the nice silver color of the unibody. but anyways: 5*
thanks for sharing!