USB Key Hardware Firewall
Now this looks pretty snazzy, a hardware firewall on a USB drive.
Yoggie Security Systems has squeezed a complete hardware firewall for Windows systems into a USB key sized form-factor. The "Yoggie Pico" runs Linux 2.6 along with 13 security applications on a 520MHz PXA270, a powerful Intel processor popular in smartphones and other high-end consumer devices.
Windows firewall squeezes into USB key
USB Key Hardware Firewall 
Linear Mode
