I read an article at eweek.com/article2/0,1895,18401 41,00.asp that compelled me to write a post. Vulnerabilities in USB drivers for Windows could allow an attacker to take control of locked workstations using a specially programmed Universal Serial Bus device.

From the article: "The buffer-overflow flaw is in device drivers that Windows loads whenever USB devices are inserted into computers running Windows 32-bit operating systems, including Windows XP and Windows 2000, said Caleb Sima, chief technology officer and founder of SPI Dynamics."