It had to happen sooner or later. At least one virus writer has gone back to the methods of the good old days. Following the idea of the floppy-disk viruses that plagued us in the '80s and early '90s comes the USB removable drive virus:

Researchers at Sophos are warning of a new worm virus that spreads via infected USB devices. The W32/SillyFD-AA program, or Silly worm, automatically spreads itself to any USB storage device connected to a PC it has infected, and then passes itself along...

What's that old saw? There's nothing new under the sun.