Hi Scott, greetings from Pittsburgh. This is awesome.
It seems that the market picks up anything with live wallpaper in the manifest, so it should be there automatically. I think Game-> Live Wallpaper vs Applications->Live Wallpaper matters as far as what category you list the app under, looks like you have it under Applications->Personalization so it should show up in Applications->Live Wallpaper, but not in the link below, which is games->Live wallpaper.