An interesting item on the Lawrence Berkeley National Laboratory site ("A New Clue to How Viruses Infect Cells", by Lynn Yarris, 16 November 2001) covers research into powerful viral molecular motors done by Carlos Bustamante and his coworkers in the Berkeley Lab's Physical Biosciences Division.
The research was previously covered here on Nanodot on 22 October 2001. A technical paper by Bustamante and coworkers (" The Physics of Molecular Motors ") is available online as an Adobe Acrobat PDF file.