You people use mouse pads? Wait, is this an old thread from 1999?
Nah - it's still a problem. Except it went from friction of the surface to optical problems. If you have a very shiny surface - even laser mice have a hell of a time tracking. For those of us with matte or nicely textured surfaces - they seem to track well. Put it on a glass top, or something with a lot of contrast variation (say a nice coating of shellac) - and tracking not so fantastic.
24" imac has glass screen cover - windex away. Using windex or strong alcohol on a plastic LCD - can prove problematic.
I worth with hi energy optics and lenses for a living - and those "chammy" clothes given for cleaning camera optics / displays and glasses down-right scare me. First thing I do is pitch-em, to make sure nobody uses them.