Orange Sock sporting apple logo.
I dunno, it just makes up for the 'now' absent orange backlights
Not so good for drops i guess, but then what is that allows you to slip the ipod comfotably in your pocket?
Sock all the way.
I used to have an iskin, but from my work in an electronic store, and more importantly personal experience, it WRECKED the back of my ipod, the metallic finish was almost worn out by the poor design. Many customers had a rant over identical problems.
They might have fixed this problem though, but make sure to check that if you go the iskin way.