The USB Keyboard Target TTY Extension is a Linux kernel patch which allows you to bind the input/keybdev.c driver which is used for USB keyboard input to a specific console. In essence, this allows you to use Linux with two keyboards (PS/2 and USB) and have the USB keyboard attached to, for example, tty5 to control a speech-based application like Emacspeak, and have your PS/2 keyboard function as before. If you can stand audio output for Websurfing, you get a Linux PC with two terminals.
