Even in 2011..
... people still believe you can get an electron microscope and recover overwritten data.
- It is not an electron microscope, it should be an MFM, Magnetic Force Microscope. Electron beams are no good against the hard drive platter. Probably no harm either, just useless.
- Even with MFM, no recovery of overwritten data on a modern hard drive is possible, because of various aspects of applied physics.