I was looking at buying dry wipe marker board, and planning to use magnetic pins to hold up letter and things so I can find them easily, but I don't have much wall space to spare... then it occurred to me... The side of my mac pro being metal, and right there on my desk, would be the perfect place to pin things where I can see them!? But, magnets and hard drives... maybe not. I'm sure those little magnets won't be nearly powerful to do any harm through the metal enclosure... but I don't want to be the first person to try it...? Anyone thought of this before? Plus, I'm not sure I won't to degrade my beautiful Mac by turning it into a common pin board.