VMware offers a Browser Appliance virtual machine

To prove how useful the just unveiled Player, VMware is offering a preconfigured virtual machine dubbed Browser Appliance.
The VM is configured with operating system (a VMware personalized Ubuntu 5.04) and applications to surf the Net remaining protected against viruses and spywares.

A zero-time, free, internet kiosk world companies can deploy everywhere and move within a simple USB key.

Download it here: http://www.vmware.com/vmtn/vm/browserapp.html