IMHO, EyeTV is just great... but the controller just eats up too much screen real estate for me. So this is a very small controller that will switch channels, pause and play, and mute, and more! With it tucked discreetly away where ever you like, you can hide the larger controller until you need it.
Mac OS X, probably 10.3.9 or higher, although I wrote it under 10.4.4. Works with EyeTV 1.84 and 2.0. Maybe others, but I didn't test them. Leopard compatible.