For anyone that is interested in using a USB keyboard/mouse combo with the WDTV Live SMP I picked up one of these Logitech systems today and it works a treat, especially if you want to use the “hidden browser” in the About menu. Small not bulky size is good for using on your lap and the mouse is a bonus. Dimensions 380mm x 110mm x 15mm.
FYI from the Logitech web site - Your mouse uses an infrared (IR) optical LED light that is invisible to the human eye. This means you won’t be able to see the light coming from the bottom of your mouse