I got the a Total Skin from bestskinsever....
I had somewhat of an annoying time putting on the Bottom skin (the 1st skin I tried). You have to make a water+mild soap solution and dip the kin in it, then apple it to the bottom of your MacBook.. Eventually I got it down perfectly, and it looks great now (can't tell it's there) as it protects the underside of the MacBook from scratches.
I had planned on using the Palm-Rest and Trackpad skins as well. Instead I decided just to let it be, and if it gets dirty, I'll clean it.
I also applied the GelaSkins decorative skin to the top.. THESE are a wonderful product!!! No water, very well made, just peel and stick!
(CLICK here to see pictures on my MacBook).
Today I am receiving from UPS the iSkin SOHO case/sleeve and the iSkin ProTouch keyboard cover... I'm excited about the case, but hesitant about how the keyboard cover will feel and work... I guess I'll find out soon.
You may want to do a search here regarding the Speck case... I have seen that a few people had issues with dirt getting between the speck case and the MacBook, resulting in some fairly bad scratched.