Following on from their Pokémon HeartGold unboxing video, ONM have recorded a Poké Walker video.
The Poké Walker accessory comes packaged with copies of HeartGold and SoulSilver. You can clip it onto your belt and as you walk around you'll earn watts for your Pokémon and you can even catch new monsters and collect items when you're not even playing the game.
You can see how it works by checking out the new video, here.