I'm starting to finalize the 0.4 release of WiiDoom now. I hope to release this within 2 weeks (at the most). It's take a lot of work, but I've got a WAD loader working now. It will launch before the WiiDoom engine (of course), and will allow you to select the version of doom (IWAD), and any additional levels (PWADs) you want loaded. I'm still touching up the graphics for it, and will continue to polish it even after this release. I'll post a screenshot in the next few days.
Music is still a challenge for WiiDoom. The SDL_mixer for the wii is absolute garbage. I haven't found anyone who's gotten it to work. I'm going to have to use an additional library to play the MIDI/MP3 music file. That's something that I should get working on the next release (but we'll see).
Anyways, thanks for your support, and start getting your PWADs ready!!!!