Yup! I've got my DS sitting next to my computer with HeartGold in the top port and Ruby in the bottom port. Of course, Ruby is frustrating me, but I still flip on HeartGold from time to time to fill up some more Pokedex entries. I've not picked up Black/White yet, but I plan to sometime in the future once finances are more in order.
I missed Celebi by misreading the Gamestop date and I've been kicking myself for it. I needed it to help finish up the Johto Pokedex.
