No you are not bricked. Formatting the wii really just screws you out of all of your game saves. It sounds like whoever did the mod was wise enough to put priiloader on there and enable the hacks to block updates. If you wii was fully modded and removing the sd card is the only problem you HAD then all you needed to do was to get another sd card and replace the apps that were on it. If you know what apps you had just get them and your wii might work like it used to. Formatting does strange things sometimes though.