Submission + - Logitech Revue Google TV root process available (reviewhorizon.com)
In order to gain root access, you’ll need physical access to Revue’s UART1 port – something like the service serial / USB port for firmware updates on some TV sets. Once you create your own serial interface, you can connect to it, start a terminal and happily write scripts. All this process is possible because fortunately Logitech did not disable their UART ports and root shell is accessible in recovery mode. You can bet though that for the next generation of boxes, this back-door will be closed.
The only tools required are a USB->TTL or similar board like an Arduino in tristate mode, a 1 to 2 GB USB memory stick, wires and of course, basic soldering skills.
Currently GTVHacker team is able to have ADBD Running for adb access, can create custom boot logos and Flash Plugin Update to allow previously blocked content providers.