In an admittedly silly 'teardown' of sorts, the iFixit guys opened up the iPad 2's Smart Cover to see how it works. The secret behind the Smart Cover's magic? 31 magnets. Twenty-one in the cover itself, ten in the iPad 2. And apparently they're all pretty strong (when taking these pictures, the magnets jumped around and fused together). A tongue in cheek zero out of ten in their repairability score. [iFixit]