I'd love to hear how it goes as you test it out.
I'm very interested in how it works with emulators. But, even more, I'm interested in how well it is supported on more modern games. I won't play first person shooters with it (I'm a PC gamer guy, remember), but they're basically essential to have for stuff 3rd person games and fun family racers or whatever.
I don't know... I really haven't touched my HTPC for gaming at all since my daughter was born (and she's almost 4). But I have this huge pile of Steam games sitting on my account (way too many of which are great games and are untouched) and I don't know... She's getting older too, and could almost certainly handle some fun Mario Kart or something. If I don't have to play Candyland yet again it'd be okay with me.
So, I've been pondering dusting off the old Steam and maybe an emulator or two and seeing what for... A new controller setup would be great. And if it was wireless and always plugged in, it would be a great alternative controller for the HTPC too. I could program all of those buttons to give me extra functions with something that might be at arms-length (when the mouse and keyboard are across the room).
As an aside, anyone know of any good, recent, arcade racers with split screen "family play" support out there? My wife loves those, and that'll help a lot with the wife-acceptance factor.