We are just about to launch a new service for high secure remote access for schools and other establishments.  The system comprises of a server c/w hardware encryption chips and all the SME server trimmings and a USB drive called a SPOK! (Secure Portable Office Key)

Inserting the SPOK into an Internet connected computer will automatically fire a secure connection to your office server.  The SPOK can be built to run a number of portable applications such as an email client or web browser.