DAMN! That looks down right epic! That wallpaper is an excellent touch. Great work so far! I'm definitely going to spring for a copy of this when it's released.
Hmmmm... I don't have the app that they are talking about. I've seen a few of them out there but they are mostly beta versions... I don't think it should be a problem as you haven't altered the default font except on the home and call screens... all in all though it could go either way... :S